| 학회 |
한국고분자학회 |
| 학술대회 |
2017년 봄 (04/05 ~ 04/07, 대전컨벤션센터) |
| 권호 |
42권 1호 |
| 발표분야 |
고분자구조 및 물성 |
| 제목 |
Regioregularity-Driven Phase Transition of Poly(3-hexylthiophene)-Based Block Copolymers |
| 초록 |
Conjugated polymer-based block copolymers (BCPs) offer great potential to provide beneficial nanostructures for efficient organic opto-electronics. However, their complicated self-assembly behavior, attributed to the strong crystallization of the conjugated blocks, is still not well understood due to the lack of a model system. Herein, we develop a series of novel conjugated BCPs, poly(3-hexylthiophene)-block-poly(2-vinylpyridine), in which the regioregularity (RR) of the P3HT block was varied from 95 to 73%. The tunable RR content allows for precise regulation of P3HT crystallization with minimal influence on the microphase-separation force between two blocks. When RR is high, the structure is characterized by P3HT nanofibrils in an amorphous matrix. In contrast, as RR decreases to 78 and 73%, P3HT crystallization is suppressed, self-assembly is dominated by the enthalpic interaction, and thermal annealing drives the formation of well-ordered lamellar or cylindrical phases. |
| 저자 |
김진성1, 김용주2, 김현정2, 김형준2, 양현승2, Gila E. Stein3, 김범준4
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| 소속 |
1한국과학기술원, 2KAIST, 3Univ. of Tennessee, 4Knoxville |
| 키워드 |
P3HT; Block copolymer; regioregularity
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| E-Mail |
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