| 학회 |
한국고분자학회 |
| 학술대회 |
2018년 가을 (10/10 ~ 10/12, 경주컨벤션센터) |
| 권호 |
43권 2호 |
| 발표분야 |
고분자구조 및 물성: 극한물성소재 |
| 제목 |
Nonmonotonic Glass Transition Temperature of Polystyrene Supported on Homogeneous Polymer-Grafted Substrates. |
| 초록 |
Understanding interfacial interactions between a substrate and polymer has been an attractive topic due to its applicability to industrial and scientific fields. Prior studies focused on the interfacial behavior of polymer melts, whereas the correlations between wetting and dewetting phenomena, interfacial energies, and the glass transition of polymer melts in contact with polymer brushes have been relatively overlooked. In this study, we modified the grafting density (σ) and chain length of polystyrene (PS) brushes lying under the PS thin films in order to investigate their effect on the glass transition temperature (Tg) using in-situ ellipsometry. As a result, we perceived a nonmonotonic variation of the Tg of the PS films with the exceeding maximum value of Tg compared to the bulk Tg. A computer simulation result supported our experimental observations in terms of the local segmental dynamics in overlaying polymer melt. |
| 저자 |
이승재1, 이호연1, Vaidyanathan Sethuraman2, Venkat Ganesan2, 류두열1
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| 소속 |
1연세대, 2Univ. of Texas |
| 키워드 |
polymer thin film; glass transition temperature; grafting density; simulation
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| E-Mail |
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