Phase Behavior of Star-Shaped Polystyrene-block-poly(methyl methacrylate) Copolymers
2014 · Macromolecules
저자
Sangshin Jang, Hong Chul Moon, Jongheon Kwak, Dusik Bae, Youngmin Lee, Jin Kon Kim, 이원보 (Won Bo Lee)
연구주제
Block Copolymer Self-Assembly · Advanced Polymer Synthesis and Characterization · Polymer crystallization and properties
NTIS 과학기술표준분류
화공 > 고분자 공정기술 > 고분자 박막/코팅 제조기술
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AI 연구 키워드·방법
블록공중합체 상거동 microdomain structure 별형 블록공중합체
원자이동 라디칼 중합(ATRP) 소각 X선 산란(SAXS) 투과전자현미경(TEM)
키워드 (OpenAlex)
star block copolymers PS-b-PMMA phase behavior microdomains hexagonal cylinders perforated lamellae lamellar microdomains molecular architecture
초록
The phase behavior of 18-arm star-shaped polystyrene- block -poly(methyl methacrylate) copolymers ((PS- b -PMMA) 18 ) with various volume fractions of PMMA block ( f PMMA ) was investigated by transmission electron microscopy and small-angle X-ray scattering. (PS- b -PMMA) 18 was synthesized by atom transfer radical polymerization from α-cyclodextrin (α-CD) having 18 functional groups for the initiation. We also prepared the corresponding linear PS- b -PMMAs by cutting the ester groups connecting α-CD and PS chains in (PS- b -PMMA) 18 through the hydrolysis. The microdomains of (PS- b -PMMA) 18 changed from body-centered-cubic spheres (BCC), hexagonally packed cylinders (HEX), perforated lamellae (PL), and lamellae (LAM), with increasing f PMMA from 0.3 to 0.8. Interestingly, (PS- b -PMMA) 18 with f PMMA of 0.77 showed highly asymmetric lamellar microdomains, while the corresponding line…
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