| 학회 |
한국고분자학회 |
| 학술대회 |
2019년 봄 (04/10 ~ 04/12, 부산컨벤션센터(BEXCO)) |
| 권호 |
44권 1호 |
| 발표분야 |
대학원생 구두발표 (영어발표, 발표15분) |
| 제목 |
Investigation of Frank-Kasper phases in High Compositionally and Conformationally Asymmetric Block Copolymers |
| 초록 |
The quasicrystalline structures disclosed in diblock copolymers (BCPs) have fascinated new insight for designing soft materials endowed with unique structural properties. Recently, Bates and coworkers discovered various of Frank-Kasper (FK) phases such as Sigma (σ), A15, C14 and C15 phases. Based on the self-consistent field theory, the stability window of σ phase between hexagonally packed cylinder (HEX) and body-centered cubic (BCC) phases becomes larger as the value of conformational asymmetry (ε) of BCPs increases. In this study, we designed a high-ε, high‒χ and low‒Tg BCPs consisting of the soft siloxane in major and rigid fluorine-containing acrylate to simplify the rapid equilibrium of nano-structures at lower temperatures. Evaluated value of ε was about 2.20 which is higher than other BCPs reported in the literature. As a result, between HEX and BCC phases under a disordered state, the FK σ and C14 phases were identified by the small-angle X-ray scattering analysis. |
| 저자 |
전승배1, 전태석1, 조성준1, 이병두2, 류두열1
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| 소속 |
1연세대, 2Advanced Photon Source |
| 키워드 |
Frank-Kasper phases; Diblock copolymers
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| E-Mail |
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