@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} }
 @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{chen_chen_he_2009, title={Suppressed Coalescence of Dispersed Viscous Poly(methyl methacrylate) Phase in Polystyrene Matrix by Glass Beads}, volume={47}, ISSN={["1099-0488"]}, DOI={10.1002/polb.21610}, abstractNote={AbstractThe effect of glass beads (GB) on morphology of polystyrene (PS)/poly(methyl methacrylate) (PMMA) blends has been studied by scanning electron microscopy (SEM) at different shear rates and during quiescent annealing. For the viscosity ratio of PMMA to PS greater than unity, the dispersed viscous PMMA phase in the blend coalesced during the shear flow or quiescent annealing. However, the domain size of the PMMA phase decreased significantly under shear even though a small amount of GB was added. The PMMA domain size further decreased and the size distribution became narrower with increasing GB content. According to SEM images, the quiescent coalescence of the PMMA phase was effectively inhibited by adding large amounts of GB, and the breakup of PMMA domains in shear flow was greatly favored by the high local shear prevailed between GB. © 2008 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 47: 25–35, 2009}, number={1}, journal={JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS}, author={Chen, Peng and Chen, Jun and He, Jiasong}, year={2009}, month={Jan}, pages={25–35} }
 @article{chen_chen_zhang_zhang_he_2006, title={Effect of glass bead packing on the fibrillation of liquid-crystalline polymer in polycarbonate}, volume={44}, ISSN={["1099-0488"]}, DOI={10.1002/polb.20755}, abstractNote={AbstractPolycarbonate (PC) was melt blended with small amount of liquid‐crystalline polymer (LCP) and various contents of glass beads (GB) having different diameters. The rheological measurements indicated that the GB addition increased the viscosity ratio and seemed unfavorable to the LCP fibrillation. However, the morphological observation showed that the LCP fibrillation was promoted by the GB addition and varied with the GB packing. With the increased GB packing by increasing the GB content and/or decreasing the GB diameter, LCP deformed from spheres and ellipsoids into stretched ellipsoids at lower shear rates and into long fibrils at higher shear rates. Although higher content of smaller GB jammed into the larger LCP droplets and inhibited the LCP fibrillation, very long LCP fibrils formed at higher shear rates at a high enough packing of GB. The relationship between GB packing and LCP fibrillation revealed two kinds of hydrodynamic effects of GB promoting the LCP fibrillation: at lower GB packing, the shear flow was enhanced by the high local shear between GB, in quantity; and for a high enough GB packing, the shear flow was changed, in quality, into elongational flow, which was more effective for the LCP fibrillation. © 2006 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 44: 1020–1030, 2006}, number={6}, journal={JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS}, author={Chen, P and Chen, J and Zhang, BQ and Zhang, J and He, JS}, year={2006}, month={Mar}, pages={1020–1030} }
 @article{chen_wu_ding_zhang_he_2006, title={Morphology evolution of a liquid crystalline polymer in polycarbonate matrix enhanced by the addition of glass beads}, volume={66}, ISSN={["1879-1050"]}, DOI={10.1016/j.compscitech.2005.11.019}, abstractNote={Polycarbonate (PC)/liquid crystalline polymer (LCP)/glass bead (GB) composites filled with various volume fractions of GB were melt blended and characterized with rheological measurements and morphological observation. The study showed that the morphology evolution of LCP droplets from spheres and ellipsoids to long fibrils during the flow was enhanced by the addition of GB. Increasing shear rate also promoted the fibrillation of LCP. At the first glimpse, increasing the apparent shear rate significantly decreased the viscosity ratio (p) and increased the capillary number (Ca), which facilitated the deformation and fibrillation of LCP, while adding GB affected these parameters less. But a 5% incorporation of GB produced a more pronounced fibrillation effect than an 8-time increase of the apparent shear rate. Image analysis and model establishment were conducted to demonstrate that a high local shear, existing between the closely nearby rotating spheres, increased Ca effectively and promoted the LCP fibrillation even at lower apparent shear rates.}, number={11-12}, journal={COMPOSITES SCIENCE AND TECHNOLOGY}, author={Chen, Peng and Wu, Lichuan and Ding, Yanfen and Zhang, Jun and He, Jiasong}, year={2006}, month={Sep}, pages={1564–1574} }
 @article{chen_zhang_he_2005, title={Increased flow property of polycarbonate by adding hollow glass beads}, volume={45}, ISSN={["1548-2634"]}, DOI={10.1002/pen.20382}, abstractNote={AbstractThe steady shear viscosity and dynamic viscoelastic properties of glass beads (GB) filled polycarbonate (PC) melts were studied at varying filler diameters and concentrations. The PC/GB composites containing small amounts of GB bore lower melt viscosity and dynamic modulus than those of pure PC at studied frequencies and shear rates, showing a “ball‐bearings” effect. For highly filled systems, the viscosity and dynamic modulus were decreased further at higher frequencies and shear rates. This ball‐bearings effect was enhanced by changing the GB from larger to smaller one. The oscillatory experiments with modified shear stress showed a stress‐dependent decrease of the viscoelastic properties, and revealed an interfacial slip mechanism, combined with the polymer chains disentanglement at melt/solid interfaces. The scaling relationship between the relative viscosity and the mean interparticle gap confirmed that the interfacial slip and polymer chains disentanglement were induced by the extremely high local shear developed in the narrow gaps between the nearby rotating spheres. POLYM. ENG. SCI., 45:1119–1131, 2005. © 2005 Society of Plastics Engineers}, number={8}, journal={POLYMER ENGINEERING AND SCIENCE}, author={Chen, P and Zhang, J and He, JS}, year={2005}, month={Aug}, pages={1119–1131} }
 @article{chen_zhang_he_2005, title={Morphology evolution of a liquid crystalline polymer confined by highly packed glass beads in polycarbonate}, volume={46}, ISSN={["1873-2291"]}, DOI={10.1016/j.polymer.2005.05.123}, abstractNote={Very long and perfectly oriented fibrils of a liquid crystalline polymer (LCP) were in situ formed in capillary flows by adding large amounts of glass beads (GB) to a polycarbonate (PC)/LCP blend. Thermodynamically the different interfacial tensions between the components made GB migrate to the LCP phase. Then the high content of GB spheres produced a confined condition, so that the LCP droplets passed through the simultaneously formed micro-capillaries, followed by being stretched into fibrils and stabilized consequently.}, number={18}, journal={POLYMER}, author={Chen, P and Zhang, J and He, JS}, year={2005}, month={Aug}, pages={7652–7657} }
 @article{chen_barker_smith_scruggs_1992, title={HANDLE OF WEFT KNIT FABRICS}, volume={62}, ISSN={["0040-5175"]}, DOI={10.1177/004051759206200404}, abstractNote={ Two groups of weft-knitted fabrics, single and double knits, were selected to represent typical summer T-shirts and winter sportswear such as sweaters and other knit tops. Two kinds of analyses were performed: subjective overall handle and primary sensory factors were evaluated using a 99 point polar-word scale, and physical and thermal properties were characterized using the Kawabata evaluation system. Regression analysis was used to relate subjective and objective measurements. The handle of single knits was strongly related to the perception of softness and lightness; the handle of double knits was influenced by the perception of slickness and tightness. Surface friction and weight were associated with the hand ranking of single knits. Fabric surface roughness and bending hysteresis were physical properties that correlated with the hand ranking for double knits. The handle of plain knit loop structures was rated better than that of tuck-loop knits. For summer T-shirt material, single jersey was the preferred choice; for winter sportswear, interlock knits were preferred to other double knits. }, number={4}, journal={TEXTILE RESEARCH JOURNAL}, author={CHEN, PL and BARKER, RL and SMITH, GW and SCRUGGS, B}, year={1992}, month={Apr}, pages={200–211} }