| 학회 |
한국고분자학회 |
| 학술대회 |
2007년 가을 (10/11 ~ 10/12, 일산킨텍스) |
| 권호 |
32권 2호 |
| 발표분야 |
고분자 구조 및 물성 |
| 제목 |
Closed-loop Phase Transition Induced by Homopolymers |
| 초록 |
Previously, the variety of observed phase transitions obtained from the fractionated Polystyrene-block-poly(n-pentyl methacrylate) [PS-b-PnPMA] was assumed to be governed by the sensitivity of the closed-loop phase behavior to average chain size, average chemical composition, and the compositional broadness. In this study, a PS-b-PnPMA copolymer having 53,500g/mol and 0.466 of PS volume fraction, which is entirely disordered state within the experimental temperature range 110 to 250℃, was blended with PS homopolymers having the different molecular weights. With increasing amount of PS, disordered PS-b-PnPMA showed a LDOT and a UODT at lower and higher temperatures, respectively. This phase behavior was investigated by depolarized light scattering measurement and Small Angle X-ray Scattering (SAXS). |
| 저자 |
황성욱1, 안형주1, 류두열1, 임규현2, 장태현2, 김진곤3
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| 소속 |
1연세대, 2포항공대 화학과, 3포항공대 화공과 |
| 키워드 |
block copolymer; phase transition; homopolymer; blend; SAXS; birefringence
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| E-Mail |
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