@article{hyun_2001, title={A new approach to characterize crystallinity by observing the mobility of plasma treated polymer surfaces}, volume={42}, ISSN={["0032-3861"]}, DOI={10.1016/S0032-3861(01)00116-1}, abstractNote={We describe in this paper a novel method to characterize crystallinity by observing the difference in chain mobility of oxygen plasma treated polymer surfaces, and further compare the crystallinity with the values obtained by X-ray diffractometry (XRD) and differential scanning calorimetry (DSC). We modified polymer surfaces with an inductively coupled plasma system to introduce polar functional groups. The immobility parameters of plasma modified surfaces were obtained by measuring contact angles as a function of storage time in air. Due to highly restricted chain mobility in the crystalline region, the crystallinity can be estimated by the fraction of immobile polar groups remaining after chain reorientation.}, number={15}, journal={POLYMER}, author={Hyun, J}, year={2001}, month={Jul}, pages={6473–6477} }
 @article{hyun_aspnes_cuomo_2001, title={Nondestructive measurement of a glass transition temperature at spin-cast semicrystalline polymer surfaces}, volume={34}, ISSN={["0024-9297"]}, DOI={10.1021/ma0012797}, abstractNote={ADVERTISEMENT RETURN TO ISSUECommunication to the...Communication to the EditorNEXTNondestructive Measurement of a Glass Transition Temperature at Spin-Cast Semicrystalline Polymer SurfacesJ. Hyun, D. E. Aspnes, and J. J. CuomoView Author Information Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695-7907 Cite this: Macromolecules 2001, 34, 8, 2395–2397Publication Date (Web):March 9, 2001Publication History Received21 July 2000Revised1 November 2000Published online9 March 2001Published inissue 1 April 2001https://doi.org/10.1021/ma0012797Copyright © 2001 American Chemical SocietyRequest reuse permissions Article Views208Altmetric-Citations18LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit Read OnlinePDF (97 KB) Get e-AlertscloseSUBJECTS:Glass transition,Optical properties,Plasma,Polymers,Positron emission tomography Get e-Alerts}, number={8}, journal={MACROMOLECULES}, author={Hyun, J and Aspnes, DE and Cuomo, JJ}, year={2001}, month={Apr}, pages={2395–2397} }
 @article{hyun_barletta_koh_yoo_oh_aspnes_cuomo_2000, title={Effect of Ar+ ion beam in the process of plasma surface modification of PET films}, volume={77}, ISSN={["0021-8995"]}, DOI={10.1002/1097-4628(20000822)77:8<1679::AID-APP4>3.0.CO;2-F}, abstractNote={In general, plasma modified polymer surfaces tend to show short aging time and rapid hydrophobic recovery after treatment. To prevent reorientation from the surface to the bulk, appropriate crosslinking is necessary among the polymer chains. In this work, an Ar+ ion beam was used to provide crosslinking to the surface. Crosslinking was shown by spectroscopic ellipsometry, AFM, and FTIR. Contact angle measurements were performed to see the aging of the modified surfaces. The surface modified with Ar+ ion beam followed by RF plasma treatment exhibited reduced chain mobility and a highly stable hydrophilic surface. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 1679–1683, 2000}, number={8}, journal={JOURNAL OF APPLIED POLYMER SCIENCE}, author={Hyun, J and Barletta, P and Koh, K and Yoo, S and Oh, J and Aspnes, DE and Cuomo, JJ}, year={2000}, month={Aug}, pages={1679–1683} }
 @article{hyun_pope_smith_park_cuomo_2000, title={Ultrathin DLC and SiOx layer deposition on poly(ethylene terephthalate) and restriction of surface dynamics}, volume={75}, DOI={10.1002/(SICI)1097-4628(20000228)75:9<1158::AID-APP9>3.3.CO;2-C}, abstractNote={The hydrophilicity of oxygen plasma-reated polymer surfaces decays with storing time in air environments. Because they are dense, highly crosslinked, and chemically stable, diamond-like carbon (DLC) films and silicon oxide films (SiOx) were deposited on poly(ethylene terephthalate) by plasma-enhanced chemical vapor deposition to restrict polymer surface dynamics. In this study, the effects of ultrathin films on surface dynamics of these polymers were investigated. The layers were deposited on substrates with thickness below 100 Å. The thickness of films was measured with a scanning analyzer ellipsometer, while ATR-IR spectroscopy and Raman spectroscopy were performed to observe the chemical structure of the films. Films below 50 Å were also shown to be effective in stabilizing the plasma treated polymer surfaces. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 75: 1158–1164, 2000}, number={9}, journal={Journal of Applied Polymer Science}, author={Hyun, J. and Pope, M. and Smith, J. and Park, M. and Cuomo, J. J.}, year={2000}, pages={1158–1164} }