| 학회 |
한국고분자학회 |
| 학술대회 |
2018년 가을 (10/10 ~ 10/12, 경주컨벤션센터) |
| 권호 |
43권 2호 |
| 발표분야 |
고분자구조 및 물성: 극한물성소재 |
| 제목 |
Morphology Re-entry of Linear S1I1S2I2 Tetrablock Copolymers at the Symmetric Overall Volume Fraction |
| 초록 |
We investigated, the morphology transitions of linear tetrablock copolymers polystyrene-block-polyisoprene-block-polystyrene-block-polyisoprene (S1I1S2I2) by varying volume fraction of I1 block, while maintaining symmetric volume fraction of total PS and PI blocks (fPS1+fPS2: fPI1+fPI2 = 1:1). S1I1S2I2 samples were synthesized by sequential anionic polymerization. An interesting sequence of morphology transitions was observed as fPI1 was increased: lamellae (L) → asymmetric lamellae (aL) → hexagonally packed PI-cylinders (CPI) → double gyroid with PI-network domains (GPI) → short-period lamellae (sL). The domain spacing of sL was nearly half of that of L, while aL had asymmetric lamellar width of PS- and PI-microdomains. It is particularly interesting that cylindrical and gyroid morphologies were observed in linear block copolymers with symmetric overall volume fraction at intermediate segregation. |
| 저자 |
안성현, 김진곤
|
| 소속 |
포항공과대 |
| 키워드 |
multi block copolymer; self-assembly
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| E-Mail |
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