@article{abbasi_mojtahedi_kotek_2020, title={Experimental study on texturability of filament yarns produced from recycled PET}, volume={90}, ISSN={["1746-7748"]}, DOI={10.1177/0040517520925859}, abstractNote={ In the present work, the texturability of filament yarns produced from recycled bottle grade polyethylene terephthalate (R-PET) and new fiber grade PET (FG-PET) were investigated and compared experimentally. Yarn spun on a spin-draw spinning machine was draw-textured. Elongation at break in each fiber was set to reach 30 ± 5% in the texturing machine. The effect of the draw-texturing conditions on thermomechanical, structural, and crimp properties were examined. Draw-texturing behaviors of the fibers were analyzed using differential scanning calorimetry and measurements of intrinsic viscosity, mechanical and crimp properties, density, and X-ray diffraction. The results indicate that crystallinity of the textured yarn from R- PET and FG-PET has increased compared to the semi-drawn yarns. Further, the lateral dimensions of the R-PET crystals are relatively well developed. Crimp properties show nearly similar response for two polymer yarns for the texturing process. It was found that R-PET can be the premier feed supply for the draw-texturing process and that filaments with appropriate confidence could be obtained from the R-PET. }, number={23-24}, journal={TEXTILE RESEARCH JOURNAL}, author={Abbasi, Marjan and Mojtahedi, Mohammad Reza Mohades and Kotek, Richard}, year={2020}, month={Dec}, pages={2703–2713} }
 @article{abbasi_kotek_2019, title={Effects of drawing process on crimp formation-ability of side-by-side bicomponent filament yarns produced from recycled, fiber-grade and bottle-grade PET}, volume={110}, ISSN={["1754-2340"]}, DOI={10.1080/00405000.2019.1611523}, abstractNote={Abstract In this study, side-by-side bicomponent filaments from recycled poly(ethylene) terephthalate (R-PET) from post-consumer bottles, fiber-grade PET (FG-PET) and bottle-grade PET (BG-PET) successfully were extruded. The bicomponent fibers in the forms of FG/R, BG/R and FG/BG were produced in a spinning machine and drawn by a thermal drawing process to improve their mechanical properties using draw ratios between ‘2.5 and 2.8’. The effects of conditions on the fiber structure, physical properties and crimp formation of resultant fibers were evaluated. The birefringence, shrinkage and mechanical properties, such as tensile strength and tensile modulus, increased and elongation at break decreased for the drawn fibers, and this was attributed to the fiber orientation. Distinct crimp formation was observed from drawn bicomponent fibers after thermal treatment. There were significant birefringence and shrinkage difference between two components in drawn bicomponent fibers caused to severe crimp formation.}, number={10}, journal={JOURNAL OF THE TEXTILE INSTITUTE}, author={Abbasi, Marjan and Kotek, Richard}, year={2019}, month={Oct}, pages={1439–1444} }
 @article{najafi_kotek_2019, title={Mechanical properties of PTT fibers by sustainable horizontal isothermal bath process}, volume={1}, ISSN={["2523-3971"]}, DOI={10.1007/s42452-019-1198-5}, abstractNote={The melt spinning process of poly (trimethylene terephthalate) was modified by the inclusion of horizontal isothermal bath (HIB) in the extrusion line. Several parameters including liquid depth, liquid temperature, and take-up speed were utilized in this study. The structural and mechanical properties of the fibers were characterized by DSC, X-ray, SEM, optical birefringence, and tensile testing. The results showed that the bath treatment increased considerably the fiber birefringence up to 0.066 by 66% and increased the crystallinity up to 47.94% by 100% compared to the control (no HIB) fibers. Drawing the HIB fibers with a low draw ratio (DR) of 1.11 increased the tensile strength up to 4.76 g/d and reduced the tensile strain down to 51.76%. Such strength is greater than the maximum value of 3.3 g/d reported before. The obtained results can widen application of PTT fibers in technical woven/nonwoven fiber products.}, number={10}, journal={SN APPLIED SCIENCES}, author={Najafi, Mesbah and Kotek, Richard}, year={2019}, month={Oct} }
 @article{naeimirad_zadhoush_neisiany_salimian_kotek_2019, title={Melt-spun PLA liquid-filled fibers: physical, morphological, and thermal properties}, volume={110}, ISSN={["1754-2340"]}, DOI={10.1080/00405000.2018.1465336}, abstractNote={Abstract PLA hollow fibers with different internal diameters were produced as a media for liquid encapsulation via high-speed melt-spinning process, changing important parameters (e.g. material type, polymer throughput, extrusion temperature, quench flow rate, drawing ratio, and winding speed). Morphological analysis showed 300% increment (linear mode) for internal and outer diameters by increasing the polymer throughput from 14.6 to 87.6 ml/min while raising the winding speed from 500 to 1500 m/min resulted in decreasing 70 and 75% for internal and external diameters, respectively. Quench flow rate and extrusion temperature showed lower effect on just internal diameter. XRD patterns indicated that using higher drawing ratio led to increase in the fiber crystallinity. According to the physical studies, although the linear density was duplicated about 10 times by increasing the polymer throughput, but the winding speed reduced 300%. Adding the polymer throughput, as the main factor, caused the tensile strength, elongation at break, modulus, tenacity, and fracture toughness to be changed approximately +650%,+217%, –68%, –58%, and +1500%, respectively. Other parameters also influenced (described in text) on tensile performances. Thermal analysis showed lower thermal stability for the fibers extruded at higher temperature. DSC results also confirmed the same trend in the degree of crystallinity of the melt-spun fibers. Melt-spun fibers were filled with glycerol as a model liquid using the previously developed microfluidic approach. Biodegradable liquid-filled fibers were conducted on composting test. Successful biodegradation is a promising result for potential applications such as agriculture pesticide and medical drug delivery.}, number={1}, journal={JOURNAL OF THE TEXTILE INSTITUTE}, author={Naeimirad, Mohammadreza and Zadhoush, Ali and Neisiany, Rasoul Esmaeely and Salimian, Saeed and Kotek, Richard}, year={2019}, month={Jan}, pages={89–99} }
 @article{yu_boy_kotek_2019, title={Novel Membranes Regenerated from Blends of Cellulose/Gluten Using Ethylenediamine/Potassium Thiocyanate Solvent System}, volume={7}, ISSN={["2164-6341"]}, DOI={10.32604/jrm.2019.00105}, abstractNote={Current industrial methods for dissolution of cellulose in making regenerated cellulose products are relatively expensive, toxic and dangerous and have environmental problems coming with the hazard chemical wastes. To solve these problems, a novel ethylenediamine and potassium thiocyanate (ED/KSCN) solvent system was developed, that is economical, ecofriendly, and highly efficient. The ED/KSCN solvent system was proven to be a suitable solvent for fabricating cellulose (blended with other polymers) membranes. In this study, gluten was used to develop nonporous membranes with cellulose. The method of casting these membranes provided better ones than the former researchers’ techniques. These composite membranes’ physical and mechanical properties were studied by analysis of morphology, viscosity, crystallinity, thermal behaviors, tensile properties and water absorption of membranes. Results showed that membranes are nonporous, uniform, strong, flexible, ecofriendly and renewable. Mechanical and physical properties were influenced by the ratio of cellulose/gluten. By blending 40% gluten, the tensile strength of cellulose membrane dropped to 15.89 MPa from 35.11 MPa. However, its elongation at break increased from 35.3% to 57.02% accordingly.}, number={1}, journal={JOURNAL OF RENEWABLE MATERIALS}, publisher={Computers, Materials and Continua (Tech Science Press)}, author={Yu, Yang and Boy, Ramiz and Kotek, Richard}, year={2019}, month={Jan}, pages={41–55} }
 @article{douglass_avci_boy_rojas_kotek_2018, title={A Review of Cellulose and Cellulose Blends for Preparation of Bio-derived and Conventional Membranes, Nanostructured Thin Films, and Composites}, volume={58}, ISSN={1558-3724 1558-3716}, url={http://dx.doi.org/10.1080/15583724.2016.1269124}, DOI={10.1080/15583724.2016.1269124}, abstractNote={ABSTRACT Cellulose has been used as a raw material for the manufacture of membranes and fibers for many years. This review gives the background of the most recent methods of treating or dissolving cellulose, and its derivatives to form polymer films or membranes for a variety of applications. Indeed, some potential applications of bacterial cellulose, nanofibrillar cellulose (NFC) for films showing enhanced barrier characteristics are reviewed as well as the utilization of cellulose nanonocrystals (CNC) for production of highly oriented super strong films or thin films is discussed. Because of the success of the Lyocell process as well as the amine/metal thiocyanate solvent blends of cellulose and other polysaccharides like starch, chitosan, and other natural polymers. Consequently, the use of cellulose (or its derivatives) and another polysaccharide dissolved as a blend is also elaborated. It is our hope that the reader will want to follow up and investigate these new systems and use them to develop end use materials for all sorts of applications, from medical to water filtration, or electrogels for use in batteries.}, number={1}, journal={Polymer Reviews}, publisher={Informa UK Limited}, author={Douglass, Eugene F. and Avci, Huseyin and Boy, Ramiz and Rojas, Orlando J. and Kotek, Richard}, year={2018}, month={Jan}, pages={102–163} }
 @misc{salimian_zadhoush_naeimirad_kotek_ramakrishna_2018, title={A review on aerogel: 3D nanoporous structured fillers in polymer-based nanocomposites}, volume={39}, ISSN={["1548-0569"]}, DOI={10.1002/pc.24412}, abstractNote={There have been a number of review papers on layered silicate and carbon nanotube reinforced polymer nanocomposites, in which the fillers have high aspect ratios. Particulate‐polymer nanocomposites containing aerogel with extremely low density, large open pores, and high surface area are also an important class of polymer nanocomposites. Thus, this article provides an overview on the effect of aerogel on mechanical and thermal properties of polymer‐based nanocomposites. Moreover, the preparation, history, classification, and characteristics of the aerogel are addressed. Among the polymer‐aerogel nanocomposites, various categories including silica and carbon aerogel‐polymer nanocomposites were discussed in detail. POLYM. COMPOS., 39:3383–3408, 2018. © 2017 Society of Plastics Engineers}, number={10}, journal={POLYMER COMPOSITES}, author={Salimian, S. and Zadhoush, A. and Naeimirad, M. and Kotek, R. and Ramakrishna, S.}, year={2018}, month={Oct}, pages={3383–3408} }
 @misc{naeimirad_zadhoush_kotek_neisiany_khorasani_ramakrishna_2018, title={Recent advances in core/shell bicomponent fibers and nanofibers: A review}, volume={135}, ISSN={["1097-4628"]}, DOI={10.1002/app.46265}, abstractNote={ABSTRACT}, number={21}, journal={JOURNAL OF APPLIED POLYMER SCIENCE}, author={Naeimirad, Mohammadreza and Zadhoush, Ali and Kotek, Richard and Neisiany, Rasoul Esmaeely and Khorasani, Saied Nouri and Ramakrishna, Seeram}, year={2018}, month={Jun} }
 @article{yoon_avci_najafi_nasri_hudson_kotek_2017, title={Development of High-Tenacity, High-Modulus Poly(ethylene terephthalate) Filaments via a Next Generation Wet-Melt-Spinning Process}, volume={57}, ISSN={["1548-2634"]}, DOI={10.1002/pen.24406}, abstractNote={In this study, PET (intrinsic viscosity of 1.05 dl/g) was melt processed with a horizontal isothermal bath (HIB) treatment. Tensile properties of PET fiber samples were highly increased by using the HIB. The process-structure-property relationship of control (no HIB) and HIB fiber samples were characterized by tensile testing, differential scanning calorimetry, birefringence measurement, scanning electron microscopy and hot-air shrinkage measurements. It was found that HIB fiber samples, which had been subjected to post-drawing process, had a high degree of molecular chain orientation, that is, a high birefringence, high crystallinity and a fibrillar structure. The best tensile property acquired from a HIB-drawn PET fiber sample was 10.24 g/d in tenacity, 114.17 g/d in modulus, and 13.49% in elongation at break. Applying the HIB in the melt spinning process was simple and required only small process space; hence, it is cost effective. In addition, acquiring HIB fiber samples was successful at a final take-up speed of 2,500 m/min. Hence, this HIB-assisted melt spinning technology has a high potential to be used in industries for technical textiles applications. POLYM. ENG. SCI., 2016. © 2016 Society of Plastics Engineers}, number={2}, journal={POLYMER ENGINEERING AND SCIENCE}, author={Yoon, Joshua H. and Avci, Huseyin and Najafi, Mesbah and Nasri, Lassad and Hudson, Samuel M. and Kotek, Richard}, year={2017}, month={Feb}, pages={224–230} }
 @article{kotek_afshari_avci_najafi_2017, title={Production of polyolefins}, ISBN={["978-0-08-101132-4"]}, DOI={10.1016/b978-0-08-101132-4.00007-2}, abstractNote={This chapter discusses various polymerization routes for major polyolefins such polyethylenes and polypropylene with emphasis on various catalysts. Ziegler–Natta catalysts as well as newer metallocene catalysts are reviewed. Major industrial polymerization processes are also discussed. This chapter finally describes the most important extrusion methods for polyolefins, which can create a variety of products from processes like melt spinning, film casting, film blowing, injection molding, blow molding, and rotational molding. Melt spinning of polyolefins is described in a great detail.}, journal={POLYOLEFIN FIBRES: STRUCTURE, PROPERTIES AND INDUSTRIAL APPLICATIONS, 2ND EDITION}, author={Kotek, Richard and Afshari, Mehdi and Avci, Huseyin and Najafi, Mesbah}, year={2017}, pages={189–264} }
 @article{boy_narayanan_chung_kotek_2016, title={Novel cellulose-collagen blend biofibers prepared from an amine/salt solvent system}, volume={92}, ISSN={["1879-0003"]}, url={https://doi.org/10.1016/j.ijbiomac.2016.08.010}, DOI={10.1016/j.ijbiomac.2016.08.010}, abstractNote={Cellulose/collagen biofibers were produced from ethylene diamine/potassium thiocyanate binary solvent system, with methanol as a coagulant. The dynamic viscosity of the solutions decreased with the gradual increase in the collagen content up to 40%. The elemental analysis showed incorporation of collagen into cellulose matrix, thereby demonstrating some degree of interaction with the cellulose matrix. The chemical and thermal analysis further revealed an intermolecular interaction between cellulose and the protein and improved thermal stability, respectively. Furthermore, the electron microscopy images mostly exhibited fibrillar morphology with no visible phase separation, indicating compatibility between the two phases. Moreover, biofibers containing higher cellulose content showed higher crystallinity, tensile, and birefringence properties of the composite fibers.}, journal={INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES}, publisher={Elsevier BV}, author={Boy, Ramiz and Narayanan, Ganesh and Chung, Ching-Chang and Kotek, Richard}, year={2016}, month={Nov}, pages={1197–1204} }
 @article{boy_bourham_kotek_2016, title={Properties of cellulose–soy protein blend biofibers regenerated from an amine/salt solvent system}, volume={23}, ISSN={0969-0239 1572-882X}, url={http://dx.doi.org/10.1007/s10570-016-1072-1}, DOI={10.1007/s10570-016-1072-1}, number={6}, journal={Cellulose}, publisher={Springer Science and Business Media LLC}, author={Boy, Ramiz and Bourham, Mohamed and Kotek, Richard}, year={2016}, month={Sep}, pages={3747–3759} }
 @article{boy_maness_kotek_2016, title={Properties of chitosan/soy protein blended films with added plasticizing agent as a function of solvent type at acidic pH}, volume={65}, ISSN={["1563-535X"]}, DOI={10.1080/00914037.2015.1038821}, abstractNote={ABSTRACT Pure and blend films from chitosan (CH) and soy protein isolate (SPI) were produced in varying compositions (CH/SPI 75/25, 50/50, 25/75 w/w) based on the solvent type (acetic and formic acids). Glycerol was used as a plasticizer. The interactions between the two biopolymers was confirmed by FTIR and TGA, indicating miscibility and compatibility. Increasing the amount of soy protein decreased the tensile strength and absorptive properties, but improved the ability of the film to withstand thermal degradation. Blend films cast using acetic acid gave higher hydrophobicity, better internal blend miscibility, and better tensile properties than blend films cast from formic acid. GRAPHICAL ABSTRACT}, number={1}, journal={INTERNATIONAL JOURNAL OF POLYMERIC MATERIALS AND POLYMERIC BIOMATERIALS}, publisher={Informa UK Limited}, author={Boy, Ramiz and Maness, Chandler and Kotek, Richard}, year={2016}, pages={11–17} }
 @article{avci_kotek_toliver_2015, title={Controlling of Threadline Dynamics via a Novel Method to Develop Ultra-High Performance Polypropylene Filaments}, volume={55}, ISSN={["1548-2634"]}, DOI={10.1002/pen.23908}, abstractNote={A detailed study was conducted to investigate the effects of horizontal isothermal bath (hIB) on the production of ultra-high performance polypropylene filaments. Two different commercial PP polymers were used with the melt flow rate of 4.1 and 36 g/10 min. The optimum process conditions depended on polymer molecular weight. Fibers showed distinct precursor morphology for each at each optimum process condition. However, two sets of filaments demonstrated similar fiber tenacity and modulus of about 7 and 75 g d−1, respectively, for as-spun and more than 12 g d−1 for tenacity and more than 190 g d−1 for modulus values of drawn fibers after just 1.49 draw ratio. The mean value for the modulus after the drawing process for the high melt flow rate was 196 g d−1. The theoretical modulus of PP is 35–42 GPa19, (275–330 g d−1), shows the hIB fiber's modulus performance is approaching its theoretical maximum value. Fibers had greatly improved thermal properties, degree of crystallinity, crystalline and amorphous orientation factors. The hIB spinning system produced highly oriented and predominantly amorphous structure for as-spun fibers and a well-defined, highly oriented crystalline fibrillar and amorphous structure after drawing process with the draw ratios lower than 1.5. POLYM. ENG. SCI., 55:327–339, 2015. © 2014 Society of Plastics Engineers}, number={2}, journal={POLYMER ENGINEERING AND SCIENCE}, author={Avci, Huseyin and Kotek, Richard and Toliver, Brandi}, year={2015}, month={Feb}, pages={327–339} }
 @article{najafi_avci_kotek_2015, title={High-performance filaments by melt spinning low viscosity nylon 6 using horizontal isothermal bath process}, volume={55}, ISSN={["1548-2634"]}, DOI={10.1002/pen.24135}, abstractNote={Several techniques and treatments have been developed for the production of high-performance nylon-6 fibers. The inherent problems of low productivity, high production cost, and high energy consumption, complexity of chemical reaction, mass transfer, and waste recovery systems make most of them inappropriate for industrial application. Horizontal isothermal bath (hIB) is an alternative ecofriendly simple treatment that can be used during melt spinning process for production of technical textile fibers. The efficacy of hIB in improving the mechanical properties of multifilament nylon-6 yarn is studied in this research. The results showed that such treatment can increase the molecular orientation of the amorphous and crystalline functions up to 0.54 and 0.983, respectively, and raised both the amorphous isotropy and fiber birefringence by 67 and 45%, respectively. Hot drawing of the yarn at a very low draw ratio of 1.38, increased the tenacity and modulus up to 10 and 43.9 g/den, respectively, and decreased the elongation to 27%. POLYM. ENG. SCI., 55:2457–2464, 2015. © 2015 Society of Plastics Engineers}, number={11}, journal={POLYMER ENGINEERING AND SCIENCE}, author={Najafi, Mesbah and Avci, Huseyin and Kotek, Richard}, year={2015}, month={Nov}, pages={2457–2464} }
 @article{avci_najafi_kilic_kotek_2015, title={Highly crystalline and oriented high-strength poly(ethylene terephthalate) fibers by using low molecular weight polymer}, volume={132}, ISSN={["1097-4628"]}, DOI={10.1002/app.42747}, abstractNote={ABSTRACT}, number={45}, journal={JOURNAL OF APPLIED POLYMER SCIENCE}, author={Avci, Huseyin and Najafi, Mesbah and Kilic, Ali and Kotek, Richard}, year={2015}, month={Dec} }
 @article{keene_bourham_viswanath_avci_kotek_2014, title={Characterization of Degradation of Polypropylene Nonwovens Irradiated by gamma-Ray}, volume={131}, ISSN={["1097-4628"]}, DOI={10.1002/app.39917}, abstractNote={ABSTRACT}, number={4}, journal={JOURNAL OF APPLIED POLYMER SCIENCE}, author={Keene, Brandi and Bourham, Mohamed and Viswanath, Vidya and Avci, Huseyin and Kotek, Richard}, year={2014}, month={Feb} }
 @article{zhu_douglass_theyson_hogan_kotek_2013, title={Cellulose and Soy Proteins Based Membrane Networks}, volume={329}, ISSN={1022-1360}, url={http://dx.doi.org/10.1002/MASY.201300032}, DOI={10.1002/MASY.201300032}, abstractNote={Summary}, number={1}, journal={Macromolecular Symposia}, publisher={Wiley}, author={Zhu, Yidan and Douglass, Eugene and Theyson, Tom and Hogan, Robina and Kotek, Richard}, year={2013}, month={Jul}, pages={70–86} }
 @article{avci_kotek_yoon_2013, title={Developing an ecologically friendly isothermal bath to obtain a new class high-tenacity and high-modulus polypropylene fibers}, volume={48}, ISSN={["1573-4803"]}, DOI={10.1007/s10853-013-7427-1}, number={22}, journal={JOURNAL OF MATERIALS SCIENCE}, author={Avci, H. and Kotek, R. and Yoon, J.}, year={2013}, month={Nov}, pages={7791–7804} }
 @article{avci_monticello_kotek_2013, title={Preparation of antibacterial PVA and PEO nanofibers containing Lawsonia Inermis (henna) leaf extracts}, volume={24}, ISSN={["1568-5624"]}, DOI={10.1080/09205063.2013.804758}, abstractNote={Concerns about health issues and environmental pollution stimulate research to find new health and hygiene related products with healing properties and minimum negative effect on the environment. Development of new, natural antibacterial agents has become one of the most important research areas to combat some pathogens such as Gram- positive and Gram-negative bacteria, fungi, algae, yeast, and some microorganisms which cause serious human infections. Lawsonia Inermis (henna) leaf extracts for preparation of antibacterial poly(ethylene oxide) (PEO) and poly(vinyl alcohol) (PVA) nanofibers via electrospinning technique were investigated. PEO and PVA based electrospun fibers containing henna extract were verified by the appearance of FTIR peaks corresponding to the pure extract. Our study demonstrates that 2.793 wt.% Li in PVA and PEO based solutions showed bactericidal effects against Staphylococcus aureus and bacteriostatic action to Escherichia coli. Concentrations of henna leaf extract strongly impacted antibacterial activities against both bacteria. Henna leaves have a great potential to be used as a source of a potent eco-friendly antimicrobial agent.}, number={16}, journal={JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION}, author={Avci, H. and Monticello, R. and Kotek, R.}, year={2013}, month={Nov}, pages={1815–1830} }
 @article{roe_kotek_zhang_2012, title={Durable hydrophobic cotton surfaces prepared using silica nanoparticles and multifunctional silanes}, volume={103}, ISSN={["0040-5000"]}, url={https://publons.com/publon/7178356/}, DOI={10.1080/00405000.2011.580540}, abstractNote={Durable non-fluorine hydrophobic cotton surfaces were obtained by treating woven cotton fabrics using combinations of silica nanoparticles and multifunctional silanes. Both the hydrophobicity and durability of treated cotton surfaces were controlled by selectively adjusting the alkyl chain length of silane hydrophobes and the surface chemistry, surface area, and content of silica nanoparticles. It was found that with an increase in the alkyl chain length of the silane hydrophobes, the hydrophobicity of treated cotton surfaces increased: the maximum surface durability was obtained at an alkyl chain length of 12 carbon atoms. Hydrophilic silica nanoparticles significantly improved the hydrophobicity and durability of treated cotton surfaces, whereas the hydrophobic silica nanoparticles were found to reduce them. The surface area of the silica nanoparticles did not have a significant impact on the cotton fabric hydrophobicity, however, a larger silica surface area resulted in better durability. The highest hydrophobicity (a contact angle of 142°) and the best durability (a 95.7% recovery of contact angle after heavy-duty industrial laundering) were achieved when treating cotton surfaces with the silane tetramethoxysilane crosslink enhancer, silane n-dodecyltrimethoxysilane hydrophobe (alkyl chain length = 12 carbon atoms), and 0.2% hydrophilic silica nanoparticles with a diameter of 12 nm.}, number={4}, journal={JOURNAL OF THE TEXTILE INSTITUTE}, author={Roe, Barry and Kotek, Richard and Zhang, Xiangwu}, year={2012}, pages={385–393} }
 @article{porter_koch_kotek_hays_contento_2012, title={Evaluation of the Food Day School Curriculum to Teach Children Why and How to EAT REAL}, volume={44}, ISSN={1499-4046}, url={http://dx.doi.org/10.1016/j.jneb.2012.03.166}, DOI={10.1016/j.jneb.2012.03.166}, abstractNote={To access how the Food Day School Curriculum (FDSC) affected students’ understandings and behaviors.}, number={4}, journal={Journal of Nutrition Education and Behavior}, publisher={Elsevier BV}, author={Porter, K. and Koch, P. and Kotek, R. and Hays, M. and Contento, I.}, year={2012}, month={Jul}, pages={S71} }
 @article{nazi_malek_kotek_2012, title={Modification of beta-cyclodextrin with itaconic acid and application of the new derivative to cotton fabrics}, volume={88}, ISSN={["0144-8617"]}, DOI={10.1016/j.carbpol.2012.01.047}, abstractNote={β-Cyclodextrin (β-CD) is capable of forming inclusion complexes but cannot form a direct covalent bond with textile materials; hence, some cyclodextrin derivatives have been synthesised with reactive groups to allow them to chemically bind to various substrates. In this study, β-CD was modified with itaconic acid containing carboxyl and vinyl groups because this bifunctional compound can be attached to β-CD via the esterification reaction and because its vinyl group can perform free-radical polymerisation. The synthesised cyclodextrin itaconate was characterised using elemental and thermal analyses, solubility testing and NMR, FTIR and Raman spectroscopy. In addition, the impact of the grafting of this vinyl monomer on the performance of cotton fabric was investigated. The presence of anchored CD nanoparticles on the surface of the fibres was demonstrated by using SEM and FTIR as well as the ability of the attached CDs to form inclusion complexes.}, number={3}, journal={CARBOHYDRATE POLYMERS}, author={Nazi, Malihe and Malek, Reza Mohammad Ali and Kotek, Richard}, year={2012}, month={Apr}, pages={950–958} }
 @article{afshari_chen_kotek_2012, title={Relationship between tensile properties and ballistic performance of poly(ethylene naphthalate) woven and nonwoven fabrics}, volume={125}, ISSN={["1097-4628"]}, DOI={10.1002/app.36442}, abstractNote={Abstract}, number={3}, journal={JOURNAL OF APPLIED POLYMER SCIENCE}, author={Afshari, Mehdi and Chen, Peng and Kotek, Richard}, year={2012}, month={Aug}, pages={2271–2280} }
 @article{scott_afshari_kotek_saul_2011, title={The promotion of axon extension in vitro using polymer-templated fibrin scaffolds}, volume={32}, ISSN={0142-9612}, url={http://dx.doi.org/10.1016/j.biomaterials.2011.03.037}, DOI={10.1016/j.biomaterials.2011.03.037}, abstractNote={Biomaterial nerve cuffs are a clinical alternative to autografts and allografts as a means to repair segmental peripheral nerve defects. However, existing clinical biomaterial constructs lack true incorporation of physical guidance cues into their design. In both two- and three-dimensional systems, it is known that substrate geometry directly affects rates of axon migration. However, the ability to incorporate these cues into biomaterial scaffolds of sufficient porosity to promote robust nerve regeneration in three-dimensional systems is a challenge. We have developed fibrin constructs fabricated by a sacrificial templating approach, yielding scaffolds with multiple 10–250 μm diameter conduits depending on the diameter of the template fibers. The resulting scaffolds contained numerous, highly aligned conduits, had porosity of ∼ 80%, and showed mechanical properties comparable to native nerve (150–300 kPa Young’s modulus). We studied the effects of the conduit diameters on the rate of axon migration through the scaffold to investigate if manipulation of this geometry could be used to ultimately promote more rapid bridging of the scaffold. All diameters studied led to axon migration, but in contrast to effects of fiber diameters in other systems, the rate of axon migration was independent of conduit diameter in these templated scaffolds. However, aligned conduits did support more rapid axon migration than non-aligned, tortuous controls.}, number={21}, journal={Biomaterials}, publisher={Elsevier BV}, author={Scott, John B. and Afshari, Mehdi and Kotek, Richard and Saul, Justin M.}, year={2011}, month={Jul}, pages={4830–4839} }
 @article{vinci_bilski_kotek_chignell_2010, title={Controlling the Formation of Silver Nanoparticles on Silica by Photochemical Deposition and Other Means dagger}, volume={86}, ISSN={["1751-1097"]}, DOI={10.1111/j.1751-1097.2010.00717.x}, abstractNote={Abstract}, number={4}, journal={PHOTOCHEMISTRY AND PHOTOBIOLOGY}, author={Vinci, John Cody and Bilski, Piotr and Kotek, Richard and Chignell, Colin}, year={2010}, pages={806–812} }
 @misc{jun_kotek_tonelli_vasanthan_2010, title={High modulus polyamide fibers}, volume={7,666,499}, number={2010 Feb. 23}, author={Jun, D. and Kotek, R. and Tonelli, A. E. and Vasanthan, N.}, year={2010} }
 @article{mohan_joyner_kotek_tonelli_2009, title={Constrained/Directed Crystallization of Nylon-6. I. Nonstoichiometric Inclusion Compounds Formed with Cyclodextrins}, volume={42}, ISSN={["1520-5835"]}, DOI={10.1021/ma901599c}, abstractNote={Noncovalently bonded crystalline inclusion compounds (ICs) have been formed by threading host cyclic starches, cyclodextrins (CDs), onto guest nylon-6 (N-6) chains. When excess N-6 is employed, nonstoichiometric (n-s)-N-6-CD-ICs, with partially uncovered and “dangling” N-6 chains, result. While the host crystalline CD lattice is stable to ∼300 °C, the uncovered, yet constrained, portions of the N-6 chains emanating from the CD-IC surfaces may crystallize below or be molten above ∼225 °C. We have been studying the constrained crystallization of the unthreaded N-6 chains “dangling” from (n-s)-N-6-CD-ICs, with comparison to bulk N-6 samples, as functions of N-6 molecular weights, lengths of uncovered N-6 chains (N-6:CD stoichiometry), and the CD host used. In the IC channels formed with host α- and γ-CDs containing 6 and 8 glucose units, respectively, single and pairs of side-by-side N-6 chains are threaded and included. In α-CD-ICs, the ∼0.5 nm channels produced by stacked α-CDs are separated by ∼1.4 nm, wh...}, number={22}, journal={MACROMOLECULES}, author={Mohan, Anushree and Joyner, Xavier and Kotek, Richard and Tonelli, Alan E.}, year={2009}, month={Nov}, pages={8983–8991} }
 @article{chen_afshari_cuculo_kotek_2009, title={Direct Formation and Characterization of a Unique Precursor Morphology in the Melt-Spinning of Polyesters}, volume={42}, ISSN={["1520-5835"]}, DOI={10.1021/ma900669r}, abstractNote={chinese acad sci, ningbo inst mat technol & engn, ningbo 315201, zhejiang, peoples r china.}, number={15}, journal={MACROMOLECULES}, author={Chen, Peng and Afshari, Mehdi and Cuculo, John A. and Kotek, Richard}, year={2009}, month={Aug}, pages={5437–5441} }
 @article{jung_ju_lee_zhang_kotek_2009, title={Electrospun hydrophilic fumed silica/polyacrylonitrile nanofiber-based composite electrolyte membranes}, volume={54}, ISSN={["1873-3859"]}, url={https://publons.com/publon/7178329/}, DOI={10.1016/j.electacta.2009.01.039}, abstractNote={Hydrophilic fumed silica (SiO2)/polyacrylonitrile (PAN) composite electrolyte membranes were prepared by electrospinning composite solutions of SiO2 and PAN in N,N-dimethylformamide (DMF). Among electrospinning solutions with various SiO2 contents, the 12 wt% SiO2 in PAN solution has highest zeta potential (−40.82 mV), and exhibits the best dispersibility of SiO2 particles. The resultant 12 wt% SiO2/PAN nanofiber membrane has the smallest average fiber diameter, highest porosity, and largest specific surface area. In addition, this membrane has a three-dimensional network structure, which is fully interconnected with combined mesopores and macropores because of a good SiO2 dispersion. Composite electrolyte membranes were prepared by soaking these porous nanofiber membranes in 1 M lithium hexafluorophosphate (LiPF6) in ethylene carbonate (EC)/dimethyl carbonate (DMC) (1:1 vol%). It is found that 12 wt% SiO2/PAN electrolyte membrane has the highest conductivity (1.1 × 10−2 S cm−1) due to the large liquid electrolyte uptake (about 490%). In addition, the electrochemical performance of composite electrolyte membranes is also improved after the introduction of SiO2. For initial cycle, 12 wt% SiO2/PAN composite electrolyte membrane delivers the discharge capacity of 139 mAh g−1 as 98% of theoretical value, and still retains a high value of 127 mAh g−1 as 89% at 150th cycle, which is significantly higher that of pure PAN nanofiber-based electrolyte membranes.}, number={13}, journal={ELECTROCHIMICA ACTA}, author={Jung, Hong-Ryun and Ju, Dong-Hyuk and Lee, Wan-Jin and Zhang, Xiangwu and Kotek, Richard}, year={2009}, month={May}, pages={3630–3637} }
 @article{gupta_saquing_afshari_tonelli_khan_kotek_2009, title={Porous Nylon-6 Fibers via a Novel Salt-Induced Electrospinning Method}, volume={42}, ISSN={["1520-5835"]}, DOI={10.1021/ma801918c}, abstractNote={Porous nylon-6 fibers are obtained from Lewis acid-base complexation of gallium trichloride (GaCl3) and nylon-6 using electrospinning followed by GaCl3 removal. DSC and FTIR results reveal that the electrospun fibers, prior to GaCl3 removal, are amorphous with no hydrogen bonds present between nylon-6 chains. GaCl3 being a Lewis acid interacts with the Lewis base sites (CdO groups) on the nylon-6 chains, thereby preventing the chains to crystallize via intermolecular hydrogen bonding. Subsequent removal of GaCl3 from the as-spun fibers by soaking the electrospun web in water for 24 h leads to the formation of pores throughout the fibers. While the average fiber diameter remains effectively the same after salt removal, the average surface area increases by more than a factor of 6 for the regenerated fibers. The dual use of a metal salt (Lewis acid) to (a) facilitate fiber formation by temporary removal of polymer interchain interactions and (b) act as a porogen provides a facile approach to obtain porous fibers via electrospinning.}, number={3}, journal={MACROMOLECULES}, author={Gupta, Amit and Saquing, Carl D. and Afshari, Mehdi and Tonelli, Alan E. and Khan, Saad A. and Kotek, Richard}, year={2009}, month={Feb}, pages={709–715} }
 @misc{chen_kotek_2008, title={Advances in the production of poly(ethylene naphthalate) fibers}, volume={48}, ISSN={["1558-3724"]}, DOI={10.1080/15583720802022331}, abstractNote={Recently with the availability of monomers for poly(ethylene naphthalate) (PEN) at a large scale and low cost, much attention has been paid to develop PEN fibers, based on their superior mechanical and thermal properties, to compete with the most commercially important poly(ethylene terephthalate) fibers, especially in some performance‐driven markets. In this review, technical papers, product reports, and patents are reviewed to summarize the developments in the production of PEN fibers via melt‐spinning. Mechanical properties of PEN fibers are presented as a function of spinning and drawing parameters. Morphology of PEN fibers are also discussed to understand factors controlling the fiber properties.}, number={2}, journal={POLYMER REVIEWS}, author={Chen, Peng and Kotek, Richard}, year={2008}, pages={392–421} }
 @article{eberl_heumann_kotek_kaufmann_mitsche_cavaco-paulo_guebitz_2008, title={Enzymatic hydrolysis of PTT polymers and oligomers}, volume={135}, ISSN={["1873-4863"]}, DOI={10.1016/j.jbiotec.2008.02.015}, abstractNote={Oligomers and polymers (film, fabrics) of the linear aromatic polyester poly(trimethylene terephthalate) (PTT) were treated with polyesterases from Thermomyces lanuginosus, Penicillium citrinum, Thermobifida fusca and Fusarium solani pisi. The cutinase from T. fusca was found to release the highest amounts of hydrolysis products from PTT materials and was able to open and hydrolyse a cyclic PTT dimer according to RP-HPLC-UV detection. In contrast, the lipase from T. lanuginosus also showed activity on the PTT fibres and on bis(3-hydroxypropyl) terephthalate (BHPT) but was not able to hydrolyse the polymer film, mono(3-hydroxypropyl) terephthalate (MHPT) nor the cyclic dimer of PTT. As control enzymes inhibited with mercury chloride were used. Surface hydrophilicity changes were investigated with contact angle measurements and the degree of crystallinity changes were determined with DSC.}, number={1}, journal={JOURNAL OF BIOTECHNOLOGY}, author={Eberl, A. and Heumann, S. and Kotek, R. and Kaufmann, F. and Mitsche, S. and Cavaco-Paulo, A. and Guebitz, G. M.}, year={2008}, month={May}, pages={45–51} }
 @article{ojha_afshari_kotek_gorga_2008, title={Morphology of electrospun nylon-6 nanofibers as a function of molecular weight and processing parameters}, volume={108}, ISSN={["1097-4628"]}, DOI={10.1002/app.27655}, abstractNote={Abstract}, number={1}, journal={JOURNAL OF APPLIED POLYMER SCIENCE}, author={Ojha, Satyajeet S. and Afshari, Mehdi and Kotek, Richard and Gorga, Russell E.}, year={2008}, month={Apr}, pages={308–319} }
 @article{ahmadi_kish_freeman_kotek_katbab_2008, title={Photostability of isotactic polypropylene containing monoazo pigment}, volume={108}, ISSN={["1097-4628"]}, DOI={10.1002/app.27951}, abstractNote={Abstract}, number={5}, journal={JOURNAL OF APPLIED POLYMER SCIENCE}, author={Ahmadi, Zahra and Kish, Mohammad Haghighat and Freeman, Harold and Kotek, Richard and Katbab, Ali Asghar}, year={2008}, month={Jun}, pages={2950–2957} }
 @article{afshari_gupta_wook_kotek_tonelli_vasanthan_2008, title={Properties of Lewis acid-base complex of nylon 6,6: Route to high performance fibers}, volume={49}, journal={Polymer}, author={Afshari, M. and Gupta, A. and Wook, D. J. and Kotek, R. and Tonelli, A. and Vasanthan, N.}, year={2008}, pages={1297–1304} }
 @article{afshari_gupta_jung_kotek_tonelli_vasanthan_2008, title={Properties of films and fibers obtained from Lewis acid-base complexed nylon 6,6}, volume={49}, ISSN={["0032-3861"]}, DOI={10.1016/j.polymer.2008.01.038}, abstractNote={A nylon 6,6 complex with GaCl3 in nitromethane (4–5 wt% nylon 6,6) was prepared at 50–70 °C over 24 h for the purpose of disrupting the interchain hydrogen bonding between nylon 6,6 chains, resulting in amorphous nylon 6,6, and increasing the draw ratio for improving the performance of nylon 6,6 fibers. After drawing, complexed films and fibers were soaked in water to remove GaCl3 and regenerate pure nylon 6,6 films and fibers. FTIR, SEM, DSC, TGA, and mechanical properties were used for characterization of the regenerated nylon 6,6 films and fibers. The amorphous complexed nylon 6,6 can be stretched to high draw ratios at low strain rates, due to the absence of hydrogen bonding and crystallinity in these complexed samples. Draw ratios of 7–13 can be achieved for complexed fibers, under low strain rate stretching. This study indicates that nylon 6,6 fibers made from the GaCl3 complexed state, using a high molecular weight polymer, can reach initial moduli up to 13 GPa, compared to initial moduli of 6 GPa for commercial nylon 6,6 fibers. Lewis acid–base complexation of polyamides provides a way to temporarily suppress hydrogen bonding, potentially increasing orientation while drawing, and following regeneration of hydrogen bonding in the drawn state, to impart higher performance to their fibers.}, number={5}, journal={POLYMER}, author={Afshari, M. and Gupta, A. and Jung, D. and Kotek, R. and Tonelli, A. E. and Vasanthan, N.}, year={2008}, month={Mar}, pages={1297–1304} }
 @misc{kotek_2008, title={Recent advances in polymer fibers}, volume={48}, ISSN={["1558-3716"]}, DOI={10.1080/15583720802020038}, abstractNote={In recent years, there has been steady progress in developing new polymers and functional polymer fibers. The objectives of this issue are to provide readers an overview of significant advances for the production of high performance fibers such as Kevlar, PBO, Spectra and Dyneema fibers and to describe new super strong M5 fibers, highly elastic XLA™ fibers and self‐crimping T‐400, T‐800, and other fibers. Additional goals are to present futuristic technologies such as shape memory fibers and compare them with innovative spandex fibers as well as to describe unique nanofibers from biopolymers by using novel electrospinning methods. Finally new, high performance poly(ethylene naphthalate) fibers will be reviewed.}, number={2}, journal={POLYMER REVIEWS}, author={Kotek, Richard}, year={2008}, pages={221–229} }
 @article{tonelli_ashrafi_gupta_kotek_2007, title={A novel method for producing porous Nylon 6 nanofibers}, journal={Polymer}, author={Tonelli, A.E. and Ashrafi, M. and Gupta, A. and Kotek, R.}, year={2007} }
 @article{ahmadi_kish_freeman_kotek_katbab_2007, title={Photo-stability of pigmented isotactic polypropylene}, volume={104}, journal={Journal of Applied Polymer Science}, author={Ahmadi, Z. and Kish, M. H. and Freeman, H. and Kotek, R. and Katbab, A. A.}, year={2007} }
 @inbook{afshari_kotek_jung_tonelli_2007, title={Producing fibers by electrospinning}, ISBN={9781420044492}, booktitle={Nanofibers and nanotechnology in textiles}, publisher={Cambridge: Woodhead Publishing, in association with The Textile Institute}, author={Afshari, M. and Kotek, R. and Jung, D. and Tonelli, A.}, editor={P.J. Brown and Stevens, K.Editors}, year={2007} }
 @inbook{afshari_wook_kotek_tonelli_2007, title={Producing polyamide nanofibers by electrospinning}, ISBN={9781845691059}, DOI={10.1201/9781439823965.ch4}, booktitle={Nanofibers and nanotechnology in textiles}, publisher={Cambridge: Woodhead Publishing}, author={Afshari, M. and Wook, D. J. and Kotek, R. and Tonelli, A.}, editor={P.J. Brown and Stevens, K.Editors}, year={2007}, pages={71–87} }
 @inbook{kotek_2007, title={Regenerated cellulose fibers}, ISBN={9780824725655}, DOI={10.1201/9781420015270.ch10}, booktitle={Handbook of fiber chemistry (3rd. Ed.)}, publisher={Boca Raton: CRC/Taylor & Francis}, author={Kotek, R.}, year={2007} }
 @inproceedings{lee_onori_afshari_cuculo_kotek_2007, title={Spinning of semi-rigid polymers}, ISBN={9788391101261}, booktitle={Proceedings of IX international scientific conference: IMTEX 2007, Lo?dz?-Poland, October 8-9, 2007}, publisher={Lo?dz? : Katedra Architektury Tekstylio?w Politechniki Lo?dzkiej}, author={Lee, H. J. and Onori, J. and Afshari, M. and Cuculo, J. and Kotek, R.}, editor={Krucin?ska, I. and Zaja?czkowski, J.Editors}, year={2007} }
 @article{pang_schmidt_kotek_tonelli_2006, title={Reorganization of the chain packing between poly(ethylene isophthalate) chains via coalescence from their inclusion compound formed with gamma-cyclodextrin}, volume={102}, ISSN={["1097-4628"]}, DOI={10.1002/app.25217}, abstractNote={Abstract}, number={6}, journal={JOURNAL OF APPLIED POLYMER SCIENCE}, author={Pang, Kyeong and Schmidt, Ben and Kotek, Richard and Tonelli, Alan}, year={2006}, month={Dec}, pages={6049–6053} }
 @misc{pang_kotek_tonelli_2006, title={Review of conventional and novel polymerization processes for polyesters}, volume={31}, ISSN={["0079-6700"]}, DOI={10.1016/j.progpolymsci.2006.08.008}, abstractNote={Commercial polyesters have been manufactured via condensation polymerization and contain small quantities of small cyclic molecules along with the much higher molecular weight linear chains. The cyclic oligomers create problems during fiber processing, such as spinning and dyeing. Recently the cyclic oligomers and their ring-opening polymerization have become of interest. The cyclic oligomers can be prepared as major products by using high-dilution methods, polymer-supported techniques, and cyclo-depolymerization. The cyclic oligoesters can then be used as feedstock for their ring-opening polymerization. Ring-opening polymerization has some advantages over the conventional polymerization method. The conventional method produces a small molecule by-product, whose removal requires high temperature and high vacuum. The overall reaction is long, varying from 5 to 10 h. On the other hand, ring-opening polymerization does not produce any by-product and the reaction occurs at atmospheric pressure. Furthermore, the process is very rapid. Polyesters like poly(ethylene terephthalate) and poly(butylene terephthalate) have been increasingly used due to their good physical properties. Among these is their ability to act as a gas barrier, so polyester film is widely used as a packaging material. The characteristics of polyesters depend on their structures, symmetries, and conformational features. Polyesters with collinear attachment of ethylene glycol diesters to the phenyl rings, like PET and PBT, allows for flipping of their phenyl rings. However, the phenyl rings in polyesters with non-collinear attachment of ethylene glycol diesters, like poly(ethylene 2,6-naphthalate) and poly(ethylene isophthalate), cannot be flipped. The flipping of phenyl rings may allow gases to permeate, as the gas molecules may use them much like a trap door or valve, so polyesters with non-collinear ethylene glycol diester linkages have improved gas barrier properties.}, number={11}, journal={PROGRESS IN POLYMER SCIENCE}, author={Pang, K. and Kotek, R. and Tonelli, A.}, year={2006}, month={Nov}, pages={1009–1037} }
 @article{pang_kotek_tonelli_2006, title={Ring-opening polymerization of the cyclic dimer of poly(trimethylene terephthalate)}, volume={44}, ISSN={["0887-624X"]}, DOI={10.1002/pola.21760}, abstractNote={Abstract}, number={23}, journal={JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY}, author={Pang, Kyeong and Kotek, Richard and Tonelli, Alan}, year={2006}, month={Dec}, pages={6801–6809} }
 @inbook{pang_kotek_tonelli_2005, title={Conventional and novel polymerizations and physical properties of polyesters}, ISBN={9781594541469}, booktitle={Focus on polymer research}, publisher={New York: Nova Science Publishers}, author={Pang, K. and Kotek, R. and Tonelli, A.E.}, editor={G.E. Zaikov and Monakov, Y. B.Editors}, year={2005} }
 @article{afshari_kotek_gupta_kish_dast_2005, title={Mechanical and structural properties of melt spun polypropylene/nylon 6 alloy filaments}, volume={97}, ISSN={["1097-4628"]}, DOI={10.1002/app.21772}, abstractNote={Abstract}, number={2}, journal={JOURNAL OF APPLIED POLYMER SCIENCE}, author={Afshari, M and Kotek, R and Gupta, BS and Kish, MH and Dast, HN}, year={2005}, month={Jul}, pages={532–544} }
 @misc{kotek_jung_tonelli_vasanthan_2005, title={Novel methods for obtaining high modulus aliphatic polyamide fibers}, volume={C45}, ISSN={["1532-1797"]}, DOI={10.1081/MC-200067716}, abstractNote={Super high modulus polyethylene fibers can be created by converting high molecular weight flexible PE chains into highly oriented and extended chain conformations. However, unlike polyethylene, aliphatic polyamides have very high cohesive energy and therefore cannot be easily drawn and highly oriented. This review addresses this fundamental problem by analyzing various novel approaches that can be used to suppress hydrogen bonding in these types of polyamides. Plasticization of such polymers with ammonia, iodine, salts, and Lewis acids, as well as dry spinning, wet spinning, and gel spinning, are discussed. Specialized techniques that involve vibrational zone drawing and annealing as well as laser heating zone drawing and annealing are also reviewed. Some of these methods definitely lead to remarkable improvements in initial modulus and other mechanical properties. The development of recombinant spider silk proteins as well progress in spinning these materials is also reported. The advantages and disadvantages of all of these processes are then summarized.}, number={3}, journal={JOURNAL OF MACROMOLECULAR SCIENCE-POLYMER REVIEWS}, author={Kotek, R and Jung, D and Tonelli, AE and Vasanthan, N}, year={2005}, pages={201–230} }
 @article{jung_kotek_vasanthan_tonelli_2004, title={High modulus nylon 6,6 fibers through lewis acid-base complexation to control hydrogen bonding to enhance drawing behavior}, volume={91}, journal={Polymeric Materials: Science and Engineering}, author={Jung, D.W. and Kotek, R. and Vasanthan, N. and Tonelli, A.E.}, year={2004}, pages={354} }
 @inproceedings{kotek_jung_tonelli_2004, title={High modulus nylon 66 fibers}, ISBN={9789537105051}, booktitle={Magic world of textiles: book of proceedings, International Textile Clothing & Design Conference, October 3rd to October 6th, 2004, Dubrovnik, Croatia}, publisher={Zagreb: Faculty of Textile Technology, University of Zagreb}, author={Kotek, R. and Jung, D.W. and Tonelli, A.E.}, year={2004} }
 @inproceedings{grancaric_kovacevic_leskovac_tarbuk_kotek_jung_2004, title={Interface phenomena of hydrolyzed polyester fabric}, ISBN={9789537105051}, booktitle={Magic world of textiles: book of proceedings, International Textile Clothing & Design Conference, October 3rd to October 6th, 2004, Dubrovnik, Croatia}, publisher={Zagreb: Faculty of Textile Technology, University of Zagreb}, author={Grancaric, A.M. and Kovacevic, V. and Leskovac, M. and Tarbuk, A. and Kotek, R. and Jung, D.W.}, year={2004} }
 @inproceedings{vasanthan_kotek_jung_shin_salem_tonelli_2004, title={Lewis acid-base complexation of polyamide 66 as a means to control hydrogen bonding to form high strength fibers and films}, volume={45}, number={1}, booktitle={Papers presented at the Anaheim, California meeting : 227th ACS national meeting, Anaheim, CA, March 28 - April 1, 2004}, publisher={Blacksburg, Va.: ACS, Div. of Polymer Chemistry}, author={Vasanthan, N. and Kotek, R. and Jung, D.W. and Shin, D. and Salem, D.R. and Tonelli, A.E.}, year={2004}, pages={787} }
 @article{vasanthan_kotek_jung_shin_tonelli_salem_2004, title={Lewis acid-base complexation of polyamide 66 to control hydrogen bonding, extensibility and crystallinity}, volume={45}, DOI={10.1016/j.polmer.2004.03.074}, number={12}, journal={Polymer}, author={Vasanthan, N. and Kotek, R. and Jung, D. W. and Shin, D. and Tonelli, A. E. and Salem, D. R.}, year={2004}, pages={4077–4085} }
 @article{vasanthan_kotek_jung_shin_tonelli_salem_2004, title={Lewis acid–base complexation of polyamide 66 to control hydrogen bonding, extensibility and crystallinity}, volume={45}, ISSN={0032-3861}, url={http://dx.doi.org/10.1016/j.polymer.2004.03.074}, DOI={10.1016/j.polymer.2004.03.074}, abstractNote={Polyamide 66 (PA66) has been complexed with the Lewis acid GaCl3 for the purpose of disrupting the interchain hydrogen bonded network. FTIR and 13C-NMR observations indicate that Ga metal cations form a 1:1 complex with the carbonyl oxygens of the PA66 amide groups. PA66–GaCl3 films are amorphous and rubbery with a single relaxation, attributable to the glass transition temperature, at ∼−32 °C and a structure that appears by X-ray diffraction to be thermally stable to at least 200 °C. The complexed films could be drawn at room temperature to draw ratios (DR) up to ∼30, and could then be decomplexed, or regenerated, by soaking in water. GaCl3 complexation and subsequent regeneration of PA66 was accomplished without changing its molecular weight, and all but ∼5 mol% of the amide groups in the regenerated PA66 were uncomplexed. The undrawn regenerated films regain levels of crystallinity much lower than possessed by the uncomplexed PA66 reference film. However, up to a DR of 8, drawing prior to regeneration increases the crystallinity, reaching crystallinity levels that are high for PA66, that has not been heat treated, and that are almost twice higher than in the uncomplexed (undrawn) reference film. It is intriguing that, in this DR regime, crystallinity increases quite sharply as the film is extended, despite the fact that molecular orientation does not appear to be increasing. For DR>8, the crystallinity decreases, but remains above that of the reference film. The level of crystallinity in PA66 can be controlled over a much wider range by the complexation-drawing-regeneration process than by conventional drawing processes.}, number={12}, journal={Polymer}, publisher={Elsevier BV}, author={Vasanthan, Nadarajah and Kotek, Richard and Jung, Dong-Wook and Shin, Daniel and Tonelli, Alan E and Salem, David R}, year={2004}, month={May}, pages={4077–4085} }
 @article{el ola_kotek_king_kim_monticello_reeve_2004, title={Studies on poly(trimethylene terephthalate) filaments containing silver}, volume={15}, ISSN={["1568-5624"]}, DOI={10.1163/1568562042459724}, abstractNote={Two methods were used to incorporate silver ions into poly(trimethylene terephthalate) (PTT) fibers. The first technique involved the direct addition of silver (I) sulfadiazine into PTT polymer prior to extrusion. The second method involved the use of silver-exchanged zeolites. Although no optimization with silver-exchanged zeolites was conducted, this study clearly showed that PTT fibers containing sufficient amounts of silver ions are effective in reducing pathological microorganisms such as Escherichia coli. Incorporation of silver-exchanged zeolites into PTT imparted a silver color to the fibers which may be attributed to the partial reduction of silver ions during spinning at 256°C. Because of the decomposition of silver (I) sulfadiazine, the spinnability of PTT fiber sample was not satisfactory and, therefore, this compound cannot be used as a carrier of silver ions in PTT. The thermal, tensile and antimicrobial properties of the spun filaments are reported in this paper.}, number={12}, journal={JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION}, author={El Ola, SMA and Kotek, R and King, M and Kim, JH and Monticello, R and Reeve, JA}, year={2004}, pages={1545–1559} }
 @article{kotek_jung_kim_smith_guzman_schmidt_2004, title={Surface hydrolysis of filaments based on poly(trimethylene terephthalate) spun at high spinning speeds}, volume={92}, ISSN={["0021-8995"]}, DOI={10.1002/app.20132}, abstractNote={Abstract}, number={3}, journal={JOURNAL OF APPLIED POLYMER SCIENCE}, author={Kotek, R and Jung, DW and Kim, JH and Smith, B and Guzman, P and Schmidt, B}, year={2004}, month={May}, pages={1724–1730} }
 @article{kotek_pang_schmidt_tonelli_2004, title={Synthesis and gas barrier characterization of poly(ethylene isophthalate)}, volume={42}, ISSN={["0887-6266"]}, DOI={10.1002/polb.20284}, abstractNote={Abstract}, number={23}, journal={JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS}, author={Kotek, R and Pang, K and Schmidt, B and Tonelli, A}, year={2004}, month={Dec}, pages={4247–4254} }
 @article{el ola_kotek_white_reeve_hauser_kim_2004, title={Unusual polymerization of 3-(trimethoxysilyl)-propyldimethyloctadecyl ammonium chloride on PET substrates}, volume={45}, ISSN={["1873-2291"]}, DOI={10.1016/j.polymer.2004.02.041}, abstractNote={3-(Trimethoxysilyl)-propyldimethyloctadecyl ammonium chloride (AEM 5700) is a trifunctional monomer that can be polymerized under acidic conditions at temperatures greater than 100 °C. Under such conditions, coatings based on AEM 5700 formed on PET substrates are relatively hydrophobic and exhibit rewetting times higher than 100 min. Hydrophilic coatings exhibiting a rewetting time of 2.8 min can be also formed when AEM 5700 is initially hydrolyzed under alkaline conditions and then polymerized under acidic conditions. This effect could be related to the accessibility of unreacted hydroxyl groups and quaternary ammonium groups for interaction with water. Excellent antimicrobial action was demonstrated for all coatings based on AEM 5700 on PET substrates. Polyester fabrics having AEM 5700 coating can be dyed with direct dyes. The loss of hydrophilic properties for AEM 5700 coatings is observed after dyeing with direct dyes.}, number={10}, journal={POLYMER}, author={El Ola, SMA and Kotek, R and White, WC and Reeve, JA and Hauser, P and Kim, JH}, year={2004}, month={May}, pages={3215–3225} }
 @inproceedings{kotek_jung_kim_smith_guzman_schmidt_2003, title={Surface hydrolysis of filaments based on poly(trimethylene terephthalate)}, ISBN={9788389003324}, booktitle={3rd AUTEX Conference: 25-27 June 2003, Gdan?sk-Poland: World Textile Conference}, publisher={Lo?dz?}, author={Kotek, R. and Jung, D.W. and Kim, J.H. and Smith, B. and Guzman, P. and Schmidt, B.}, year={2003} }
 @article{afshari_kotek_kish_dast_gupta_2002, title={Effect of blend ratio on bulk properties and matrix-fibril morphology of polypropylene/nylon 6 polyblend fibers}, volume={43}, ISSN={["0032-3861"]}, DOI={10.1016/S0032-3861(01)00689-9}, abstractNote={Ternary blends of polypropylene (PP), nylon 6 (N6) and polypropylene grafted with maleic anhydride (PP/N6/PP-g-MAH) as compatibilizer with up to 50 wt% of N6 were investigated. PP-g-MAH content was varied from 2.5 to 10%. Blends of the two polymers PP/N6 (80/20) without the compatibilizer were also prepared using an internal batch mixer and studied. The ternary blends showed different rheological properties at low and high shear rates. The difference depended on the amount of N6 dispersed phase. Co-continuous morphology was observed for the blend containing 50% N6. This blend also exhibited higher viscosity at low shear rate and lower viscosity at high shear rates than the value calculated by the simple rule of mixture. At higher shear rates, viscosity was lower than that given by the rule of mixture for all blend ratios. An increase in viscosity was observed in the 80/20 PP/N6 blend after the concentration of the interfacial agent (PP-g-MAH) was increased. Polyblends containing up to 30% N6 could be successfully melt spun into fibers. DSC results showed that dispersed and matrix phases in the fiber maintained crystallinity comparable to or better than the corresponding values found in the neat fibers. The dispersed phase was found to contain fibrils. By using SEM and LSCM analyses we were able to show that the N6 droplets coalesced during melt spinning which led to the development of fibrillar morphology.}, number={4}, journal={POLYMER}, author={Afshari, M and Kotek, R and Kish, MH and Dast, HN and Gupta, BS}, year={2002}, month={Feb}, pages={1331–1341} }
 @article{kim_lee_yoon_lyoo_kotek_2001, title={Alkaline depolymerization of poly(trimethylene terephthalate)}, volume={82}, ISSN={["0021-8995"]}, DOI={10.1002/app.1828.abs}, abstractNote={The purpose of this study was to investigate the effects of reaction media, composition, and temperature on the rate of the alkaline depolymerization of poly(trimethylene terephthalate) (PTT). The alkaline depolymerization of PTT was carried out at 160–190°C in ethylene glycol (EG), diethylene glycol (DEG), triethylene glycol (TEG), ethylene glycol monobutyl ether (EGMBE), diethylene glycol monoethyl ether (DEGMEE), and a mixture of these solvents. During the reaction, PTT was quantitatively converted to disodium terephthalate and 1,3-propanediol. The alkaline depolymerization reaction rate constants were calculated based on the concentration of sodium carboxylate, which was equivalent to the molar amount of sodium hydroxide. The depolymerization rate of PTT was increased by increasing the reaction temperature and by adding ethereal solvents. Moreover, the depolymerization rate was significantly accelerated in the order of EG < DEG < TEG < EGMBE < DEGMEE. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 99–107, 2001}, number={1}, journal={JOURNAL OF APPLIED POLYMER SCIENCE}, author={Kim, JH and Lee, JJ and Yoon, JY and Lyoo, WS and Kotek, R}, year={2001}, month={Oct}, pages={99–107} }
 @article{kotek_jung_smith_kim_2001, title={Effect of high speed spinning on physical properties and dyeing kinetics of PTT filaments}, volume={51}, journal={Chemical Fibers International}, author={Kotek, R. and Jung, D.W. and Smith, B. and Kim, J.H.}, year={2001}, pages={204} }
 @inproceedings{kotek_abo el ola_white_hauser_2001, title={Polymerization of silane quaternary ammonium salts on fibers}, volume={42}, number={1}, booktitle={Papers presented at the San Diego, California, meeting.}, publisher={Newark, NJ: Division of Polymer Chemistry, American Chemical Society}, author={Kotek, R. and Abo El Ola, S. M. and White, W. C. and Hauser, P.}, year={2001}, pages={106} }
 @misc{kotek_li._shore_yeh_2000, title={Process of making hollow filaments}, volume={6,120,718}, number={2000 Sept. 19}, publisher={Washington, DC: U.S. Patent and Trademark Office}, author={Kotek, R. and Li., W and Shore, G. W. and Yeh, L.}, year={2000} }
 @misc{corbin_handerman_kotek_porter_dellinger_davis_1999, title={Reclaiming epsilon-caprolactam from nylon 6 carpet}, volume={5,977,193}, number={1999 Nov. 2}, publisher={Washington, DC: U.S. Patent and Trademark Office}, author={Corbin, T. F. and Handerman, A. C. and Kotek, R. and Porter, W. D. and Dellinger, J. A. and Davis, E. A.}, year={1999} }
 @misc{kotek_matthies_1997, title={Fiber-forming modified polyamide blends}, volume={5,618,885}, number={1997 April 8}, publisher={Washington, DC: U.S. Patent and Trademark Office}, author={Kotek, R. and Matthies, H. G.}, year={1997} }
 @misc{kotek_matthies_1997, title={Process for melt-spinning fibers from modified polyamide blends}, volume={5,623,024}, number={1997 April 22}, publisher={Washington, DC: U.S. Patent and Trademark Office}, author={Kotek, R. and Matthies, H. G.}, year={1997} }
 @misc{kotek_matthies_1997, title={Saxony carpets having fibers formed of modified polyamide blends}, volume={5,612,112}, number={1997 March 18}, publisher={Washington, DC: U.S. Patent and Trademark Office}, author={Kotek, R. and Matthies, H. G.}, year={1997} }
 @misc{kotek_matthies_1996, title={Modified nylon fibers}, volume={5,559,194}, number={1996 Sept. 24}, publisher={Washington, DC: U.S. Patent and Trademark Office}, author={Kotek, R. and Matthies, H. G.}, year={1996} }
 @misc{kotek_1994, title={Semi-continuous depolymerization of nylon 6 polymer}, volume={5,294,707}, number={1994 March 15}, publisher={Washington, DC: U.S. Patent and Trademark Office}, author={Kotek, R.}, year={1994} }
 @misc{kotek_l._1993, title={Hollow trilobal cross-section filament}, volume={5,208,107}, number={1993 May 4}, publisher={Washington, DC: U.S. Patent and Trademark Office}, author={Kotek, R. and L., Yeh}, year={1993} }
 @article{preston_krigbaum_1992, title={Poly(p-Phenyleneterephthalamide) of high molecular weight by the modified Higashi phosphorylation reaction}, volume={11}, journal={Macromolecular Syntheses}, author={Preston, J. and Krigbaum, W.R.}, year={1992} }
 @article{preston_krigbaum_1992, title={Poly(p-benzamide) of moderate molecular weight by Yamazaki phosphorylation reaction}, volume={11}, journal={Macromolecular Syntheses}, author={Preston, J. and Krigbaum, W.R.}, year={1992} }
 @article{kotek_krigbaum_1988, title={THERMOTROPIC POLYESTERS OF 4'-HYDROXYPHENYL-4-HYDROXYBENZOATE - A STUDY OF THE TRANSITION-TEMPERATURES}, volume={26}, ISSN={["0887-6266"]}, DOI={10.1002/polb.1988.090260603}, abstractNote={Abstract}, number={6}, journal={JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS}, author={KOTEK, R and KRIGBAUM, WR}, year={1988}, month={Jun}, pages={1173–1186} }
 @article{krigbaum_kotek_preston_1986, title={COMMENT ON A PAPER BY CLOSE, FORNES, AND GILBERT}, volume={24}, ISSN={["1099-0488"]}, DOI={10.1002/polb.1986.090240317}, abstractNote={Journal of Polymer Science Part B: Polymer PhysicsVolume 24, Issue 3 p. 713-715 Note Comment on a paper by close, Fornes, and Gilbert W. R. Krigbaum, W. R. Krigbaum Gross Chemical Laboratory Duke University Durham, North Carolina 27706Search for more papers by this authorR. Kotek, R. Kotek Gross Chemical Laboratory Duke University Durham, North Carolina 27706Search for more papers by this authorJ. Preston, J. Preston Monsanto Fibers and Intermediates Co. Pensacola, Florida 32575Search for more papers by this author W. R. Krigbaum, W. R. Krigbaum Gross Chemical Laboratory Duke University Durham, North Carolina 27706Search for more papers by this authorR. Kotek, R. Kotek Gross Chemical Laboratory Duke University Durham, North Carolina 27706Search for more papers by this authorJ. Preston, J. Preston Monsanto Fibers and Intermediates Co. Pensacola, Florida 32575Search for more papers by this author First published: March 1986 https://doi.org/10.1002/polb.1986.090240317AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Volume24, Issue3March 1986Pages 713-715 RelatedInformation}, number={3}, journal={JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS}, author={KRIGBAUM, WR and KOTEK, R and PRESTON, J}, year={1986}, month={Mar}, pages={713–715} }
 @article{krigbaum_hakemi_kotek_1985, title={NEMATOGENIC POLYMERS HAVING RIGID CHAINS .1. SUBSTITUTED POLY(PARA-PHENYLENE TEREPHTHALATES)}, volume={18}, ISSN={["0024-9297"]}, DOI={10.1021/ma00147a027}, abstractNote={Influence des substituants Cl, Br, C 6 H 5 et C 6 H 13 sur la temperature de transition de ces polymeres}, number={5}, journal={MACROMOLECULES}, author={KRIGBAUM, WR and HAKEMI, H and KOTEK, R}, year={1985}, pages={965–973} }
 @article{krigbaum_kotek_mihara_preston_1985, title={PREPARATION OF POLYAMIDES VIA THE PHOSPHORYLATION REACTION .10. A STUDY OF HIGASHI REACTION CONDITIONS}, volume={23}, ISSN={["0887-624X"]}, DOI={10.1002/pol.1985.170230706}, abstractNote={Abstract}, number={7}, journal={JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY}, author={KRIGBAUM, WR and KOTEK, R and MIHARA, Y and PRESTON, J}, year={1985}, pages={1907–1916} }
 @article{krigbaum_kotek_preston_1984, title={PREPARATION OF POLYAMIDES VIA THE PHOSPHORYLATION REACTION .8.}, volume={22}, ISSN={["1099-0518"]}, DOI={10.1002/pol.1984.170220339}, abstractNote={Preparation de poly (p-benzamide) et poly(p-phenyleneterephtalamide) dans les conditions de Yamazaki ou Higashi}, number={3}, journal={JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY}, author={KRIGBAUM, WR and KOTEK, R and PRESTON, J}, year={1984}, pages={873–876} }
 @article{krigbaum_kotek_mihara_preston_1984, title={PREPARATION OF POLYAMIDES VIA THE PHOSPHORYLATION REACTION .9. EFFECT OF REACTION TEMPERATURE ON MOLECULAR-WEIGHT ON POLY(P-PHENYLENE TEREPHTHALAMIDE)}, volume={22}, ISSN={["0887-624X"]}, DOI={10.1002/pol.1984.170221239}, abstractNote={Effet de la temperature de la reaction sur la viscosite intrinseque du polymere prepare dans les conditions de Higashi}, number={12}, journal={JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY}, author={KRIGBAUM, WR and KOTEK, R and MIHARA, Y and PRESTON, J}, year={1984}, pages={4045–4047} }
 @article{krigbaum_kotek_ishikawa_hakemi_preston_1984, title={THERMOTROPIC HOMOPOLYESTERS .6. A STUDY OF POLYMERS BASED ON 4'-HYDROXYPHENYL-4-HYDROXYBENZOATE}, volume={20}, ISSN={["0014-3057"]}, DOI={10.1016/0014-3057(84)90042-9}, abstractNote={Polyesters were synthesized from 4′-acetoxyphenyl-4-acetoxybenzoate and dibasic acids having 6–12 methylene units using the transesterification procedure described by van Luyen and Strzelecki. These polymers are designated Sn, where n is the number of methylene units in the diacid. The transition temperatures of our polymers stand in reasonable agreement with those reported by Strzelecki and Liébert. The nematic phase extends over a broad temperature range (70–100°), and the biphasic region spans an additional 50°. The texture of the nematic phase is normal for S7-1 having ηinh = 0.30 dl/g, but the other polymers show bright nematic droplets on a darker background. The density of droplets decreases with increasing ηinh in the S7 series, and as η is increased for the other polymer homologues. Only S7-1 exhibits Williams domains on application of an electric field. Quite different properties are found for the polyester having ηinh = 0.80 dl/g prepared from 4′-hydroxyphenyl-4-hydroxybenzoate and the diacid chloride. It melted sharply 24° higher, and its nematic phase showed a normal texture. Moreover, its nematic-isotropic transition appears in the DSC as a sharp peak, and the biphasic region spans only 9°. We believe the transesterification reaction occasionally involves the internal ester linkage in the monomer unit, producing a polymer with no definite repeating unit structure and a distribution of hard segment lengths.}, number={3}, journal={EUROPEAN POLYMER JOURNAL}, author={KRIGBAUM, WR and KOTEK, R and ISHIKAWA, T and HAKEMI, H and PRESTON, J}, year={1984}, pages={225–235} }
 @article{kotek_krigbaum_preston_1983, title={PREPARATION OF POLYAMIDES VIA THE PHOSPHORYLATION REACTION .7. SYNTHESIS OF POLYOXAMIDES AND REGULAR COPOLYOXAMIDES}, volume={21}, ISSN={["0887-624X"]}, DOI={10.1002/pol.1983.170210919}, abstractNote={Journal of Polymer Science: Polymer Chemistry EditionVolume 21, Issue 9 p. 2837-2841 Note Preparation of polyamides via the phosphorylation reaction. VII. Synthesis of polyoxamides and regular copolyoxamides R. Kotek, R. Kotek Gross Chemical Laboratory, Duke University, Durham, North Carolina 27706Search for more papers by this authorW. R. Krigbaum, W. R. Krigbaum Gross Chemical Laboratory, Duke University, Durham, North Carolina 27706Search for more papers by this authorJ. Preston, J. Preston Monsanto Fibers and Intermediates Company, Pensacola, Florida 32575Search for more papers by this author R. Kotek, R. Kotek Gross Chemical Laboratory, Duke University, Durham, North Carolina 27706Search for more papers by this authorW. R. Krigbaum, W. R. Krigbaum Gross Chemical Laboratory, Duke University, Durham, North Carolina 27706Search for more papers by this authorJ. Preston, J. Preston Monsanto Fibers and Intermediates Company, Pensacola, Florida 32575Search for more papers by this author First published: September 1983 https://doi.org/10.1002/pol.1983.170210919Citations: 7AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Citing Literature Volume21, Issue9September 1983Pages 2837-2841 RelatedInformation}, number={9}, journal={JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY}, author={KOTEK, R and KRIGBAUM, WR and PRESTON, J}, year={1983}, pages={2837–2841} }
 @article{acierno_lamantia_polizzotti_ciferri_krigbaum_kotek_1983, title={Thermotropic homopolyesters. IV: Study of fibers formation}, volume={21}, DOI={10.1002/pol.1983.180211012}, abstractNote={Abstract}, journal={Journal of Polymer Science. Part B, Polymer Physics}, author={Acierno, D. and LaMantia, F. P. and Polizzotti, G. and Ciferri, A. and Krigbaum, W. R. and Kotek, R.}, year={1983}, pages={2027} }
 @article{preston_krigbaum_kotek_1982, title={Synthesis of high-molecular-weight rodlike polyamides and block copolymers}, volume={20}, DOI={10.1002/pol.1982.170201119}, abstractNote={Abstract}, number={11}, journal={Journal of Polymer Science. Part A, Polymer Chemistry}, author={Preston, J. and Krigbaum, W. R. and Kotek, R.}, year={1982}, pages={3241} }
 @article{laszkiewicz_kotek_1981, title={Synthesis of cyclolinear phosphazene oligomers by reaction of cylcophosphazene dichloride trimer, dissodium salts of dihydroxy compounds and sodium p-bromophenolate}, volume={99}, journal={Macromolecular Materials and Engineering}, author={Laszkiewicz, B. and Kotek, R.}, year={1981}, pages={1} }