| 학회 |
한국고분자학회 |
| 학술대회 |
2017년 가을 (10/11 ~ 10/13, 제주컨벤션센터) |
| 권호 |
42권 2호 |
| 발표분야 |
고분자구조 및 물성 |
| 제목 |
Tendency of Aspect Ratio in Anisotropic Particles according to Flory-Huggins Interaction Parameter (χ): How Long AR Can Be? |
| 초록 |
Generation of anisotropic block copolymer (BCP) particles simply by solvent evaporation from emulsion droplet have received great attention. Interestingly, degree of shape-anisotropy was revealed to be dependent on molecular weight of BCP and particle size, providing a platform for precise control of particle aspect ratio (AR). However, less attention was paid on tuning Flory-Huggins interaction parameter (χ) to systematically control particle AR. Herein, we study effect of χ parameter on AR by introducing three different BCPs with varying χ values. Polystyrene-b-polybutadiene (PS-b-PB), polystyrene-b-polydimethylsiloxane (PS-b-PDMS), and polystyrene-b-poly4-vinylpyridine (PS-b-P4VP) with similar degree of polymerization (N) were prepared for accurate comparison. Greater AR was observed for BCP particles prepared from higher χ. Such tendency implies that further design of high χ BCPs will enable generation of highly-anisotropic BCP particles. |
| 저자 |
이영준1, 신재만1, 구강희1, Kin LIAO2, 김범준1
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| 소속 |
1KAIST, 2Khalifa Univ. |
| 키워드 |
Block copolymer; Self-assembly; Block copolymer particles; Anisotropic particles; Flory-Huggins interaction parameter; Aspect ratio
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| E-Mail |
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