Synthesis and characterization of PS-b-PMMA block copolymers with tunable block dispersity = 블록다분산성 조절 가능한 PS-b-PMMA 블록 공중합체 합성 및 분석

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For several decades, block copolymer with broad molecular weight distribution (MWD) has been interested due to its influence on processability and block copolymer self-assembly such as phase behavior and microdomain periodicity. However, new controlled synthetic methods for diblock copolymers and the properties of polydisperse diblock copolymers are still required to control the dispersities and composition of a distribution. In this thesis, we report the synthesis and characterization of poly(styrene)-b-poly(methyl methacrylate) (PS-b-PMMA) diblock copolymers where dispersity in both blocks are varied systematically. The PS and PMMA homopolymers are synthesized via controlled free radical polymerization, and their block dispersities are varied by manipulating either initiator feed rate or chain transfer agent addition rate. The desired diblock copolymers are then obtained by coupling the azido-end functionalized PS and alkyne-end functionalized PMMA homopolymers of desired dispersity via click reaction. For the domain spacing and morphology characterization, the synthesized PS-b-PMMA diblock copolymers are analyzed by SAXS and AFM.
Advisors
Li, Shengresearcher리섕researcher
Description
한국과학기술원 :생명화학공학과,
Publisher
한국과학기술원
Issue Date
2019
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2019.2,[iv, 42 p. :]

Keywords

molecular weight distribution (MWD)▼aPS-b-PMMA▼acontrolled free radical polymerization▼adispersity▼adomain spacing▼amorphology; 분자량 분포▼aPS-b-PMMA▼a리빙 라디칼 중합▼a다분산성▼a도메인 주기▼a모폴로지

URI
http://hdl.handle.net/10203/266323
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=843266&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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