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논문 기본 정보

자료유형
학위논문
저자정보

이건창 (경희대학교, 경희대학교 대학원)

지도교수
임지우
발행연도
2019
저작권
경희대학교 논문은 저작권에 의해 보호받습니다.

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이 논문의 연구 히스토리 (3)

초록· 키워드

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A ladder-type polysilsesquioxane(LPSQ) composed of a ladder-shaped silicon backbone and an organic functional group bonded to the side chain is an organic-inorganic hybrid polymer, which has superior thermal stability and mechanical strength as compared with an organic polymer. In this study, polyethylene oxide (PEG) was introduced as a hydrophilic component, because LPSQ has limited application due to its large hydrophobicity. A silane macromonomer containing PEG as a monomer of LPSQ was synthesized. The thiol terminated PEG with controlled molecular weight and molecular weight distribution through anionic polymerization was prepared, and allyl silane was added to it to obtain a macromonomer free of side products through thiol-ene click reaction. LPSQ-g-poly(ethylene oxide) having improved hydrophilicity was synthesized by copolymerizing the PEG-containing trimethoxysilane as a macromonomer. Copolymerization with phenyltrimethoxysilane was carried out for hydrophilic-hydrophobic control, and copolymers with various compositions could be prepared. In addition, copolymerization with a methacryl group was carried out to improve the physical properties through various curing reaction. The chemical structure of the synthesized LPSQ was analyzed by GPC, NMR, and FT-IR. The copolymers synthesized by the PEG component showed crystallinity and the degree of crystallinity could be controlled by changing the copolymerization components. LPSQ-g-poly(ethylene oxide) with controlled crystallinity is expected to be applied to various fields such as polymer electrolyte or gas sepration membrane by controlling the transport behavior in the polymer film produced from LPSQ copolymer.

목차

Abstract ⅲ
List of Figure ⅳ
List of Table ⅵ
제 1 장. 도 입 1
1.1. Sol-gel 합성법 1
1.2. 폴리실세스키옥산의 합성 5
1.3. Ladder and ladder-like structured polysilsesquioxanes 8
1.4. Grafting polymer 15
1.5. 폴리에틸렌 옥사이드(PEO) 17
1.6. 고분자 전해질에서의 폴리에틸렌 옥사이드(PEO)의 응용 분야 19
1.7. 가스분리막에서의 폴리에틸렌 옥사이드(PEO)의 응용분야 21
1.8. Hydrosilylation 23
1.9. 연구 목표 26
제 2 장. 실 험 27
2.1. 실험 시약 27
2.2. MPEG-Allyl (MPEG-Allyl)의 합성 28
2.3. Thiol-ene 반응을 통한 MPEG-trimethoxysilane 합성 29
2.4. Ladder-like polysilsesquioxane-g-poly(ethylene exide) monomethyl ether의 합성 30
2.5. Characterization 31
제 3 장. 결 과 및 토 의 32
3.1. Macromonomer(MPEG-TMS)의 합성 32
3.1.1 MPEG-Allyl (MPEG-Allyl) 합성 32
3.1.2. MPEG-Trimethoxysilane(MPEG-TMS)의 합성 38
3.2. Ladder-like polysilsesquioxane-g-poly(ethylene oxide), (LPSQ-g-PEO)의 합성 46
제 4 장. 결 론 61
참 고 문 헌 62

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