| 학회 |
한국고분자학회 |
| 학술대회 |
2015년 가을 (10/06 ~ 10/08, 대구컨벤션센터(EXCO)) |
| 권호 |
40권 2호 |
| 발표분야 |
Korea-Taiwan Joint Symposium: Macromolecular Assembly and Nanostructured Polymers (영어발표) |
| 제목 |
Effect of Hydrogen Bonding on the Crystallization of Copolymer Blends |
| 초록 |
We studied the nonisothermal crystallization of binary copolymer blends composed of polystyrene-block-poly(ethylene oxide) (PS-PEO) and a polyacrylic acid-based copolymer, including polystyrene-block-polyacrylic acid (PS-b-PAA) and polystyrene-graft-polyacrylic acid (PS-g-PAA). In PS-PEO/PS-b-PAA blends, nearly all the PAA molecules formed hydrogen bonding with PEO, which facilitated the localization of PS-b-PAA at the interface of the PS-PEO microdomains. As a result, the crystal thickness, crystallite size, and crystallization rate of PEO increased with the addition of PS-b-PAA. In PS-PEO/PS-g-PAA blends, hydrogen bonding strength between PEO and PAA decreased considerably, and PS-g-PAA preferred to disperse in the PEO domain because of the steric hindrance of PS-g-PAA. This expanded the PEO domain and induced a phase transition to a cylindrical structure. Two crystallization temperatures were obtained, which was a result of PEO crystallization in lamellar and cylindrical domains. |
| 저자 |
Chieh-Tsung Lo1, Yu-Wen Chen2
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| 소속 |
1Department of Chemical Engineering, 2National Cheng Kung Univ. |
| 키워드 |
block copolymer; self-assembly
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| E-Mail |
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