| 학회 |
한국공업화학회 |
| 학술대회 |
2015년 가을 (11/04 ~ 11/06, 제주국제컨벤션센터(ICCJEJU)) |
| 권호 |
19권 2호 |
| 발표분야 |
고분자_포스터 |
| 제목 |
Tuning Mechanical and Optoelectrical Properties of Poly(3-hexylthiophene) through Systematic Regioregularity Control |
| 초록 |
While the regioregularity (RR) of conjugated polymers is known to have a strong influence on their inherent properties, systematic study of the RR effect has been limited due to the lack of a synthetic methodology. Herein, we successfully produced a series of poly(3-hexylthiophene)s (P3HTs) having a wide range of RR values from 64 to 98%. Incorporation of controlled amounts of head-to-head (H-H) coupled dimer in modified Grignard metathesis polymerization allows a facile tuning of the RR of the P3HTs with comparable molecular weight and low polydispersity. Then, we investigated the effect of RR on structural, electrical and mechanical properties of P3HTs in which a higher content of H-H regio-defects, namely lower RR, systematically lowered the degree of crystallinity. Although highly RR P3HT had a higher charge carrier mobility, strong crystallinity induced high brittleness and stiffness, resulting in device failure under a very small strain as shown in tensile and bending tests. The tensile modulus was reduced significantly from 287 MPa (RR 98%) to 13 MPa (RR 64%), and also RR 64% P3HT film had much better mechanical resilience with an order of magnitude higher elongation at break than that of RR 98% polymer. |
| 저자 |
김범준1, Kin Liao2, 김택수1, 정운룡3, 오준학3, 송인호3, 유호정3, 이원호1, 김재한1, 김진성1, 김형준1
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| 소속 |
1KAIST, 2Khalifa Univ., 3POSTECH |
| 키워드 |
regioregularity; mechanical properties; opoelectrical properties; P3HT
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| E-Mail |
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