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논문 기본 정보

자료유형
학위논문
저자정보

최지영 (경북대학교, 경북대학교 대학원)

지도교수
김한도
발행연도
2015
저작권
경북대학교 논문은 저작권에 의해 보호받습니다.

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초록· 키워드

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PDLC(Polymer dispersed Liquid Crystal) is applied to disperse the liquid crystral in a polymer matrix and take center stage nowdays because of the many advantages. So various studies have been conducted. For existing PVA- iodine polarizing film had some drawbacks for low durability due to its sublimation of iodine. Bulk polymerizing VAc in PVAc was saponified PVA was synthesized by them.
In this study, PVAc was polymerized through Bulk polymerization reaction by low temperature initiator, ADMVN. And then, PVA was synthesized by them. These polymers were characterized by GPC, NMR and FT-IR spectrum.
A number-average degree of polymerization(Pn) for PVAs was about 1,100 and s-diad contents is 55.18%. Also saponification was 96.04%, which was characterized by 1H NMR. To confirm the structure of the
PVA, FT-IR spectrum was analyzed and ester group of PVAc was confirmed that the hydroxyl group is substituted disappears.
When PVA was dissolving in DMSO, principle of PDLC was applied. So Liquid crystal, E7, was added to that solution and preparation polarizing film by varying the electric field strength and concentration of the iodination.
This polarizing film was characterized by UV-vis spectrum. Consequently, polyvinyl confirmed that the hydroxyl group is substituted disappears.
When PVA was dissolving in DMSO, principle of PDLC was applied. So Liquid crystal, E7, was added to that solution and preparation polarizing film by varying the electric field strength and concentration of the iodination. This polarizing film was characterized by UV-vis spectrum. Consequently, polyvinyl alcohol polarizing film prepared in a liquid crystal orientation by the proper electrical field was improvement in the degree of polarization.

목차

목 차
List of Tables Ⅳ
List of Figures Ⅴ
Ⅰ. 서 론 1
1.1. Poly(vinyl alcohol) 1
1.2. 편광필름 6
1.2.1. PVA 편광필름 6
1.2.2. 요오드의 염착과 배향 9
1.2.3. LCD 구동 원리 16
1.2.4 Polymer Dispersed Liquid Crystal (PDLC) 18
1.2.5. Liquid crystal (액정) 20
1.2.5.1. E7 22
1.3. 실험의 목적 26
Ⅱ. 실 험 28
2.1. 시약 및 재료 28
2.2. 실험 29
2.2.1. VAc의 벌크중합 29
2.2.2. PVA의 비누화 29
2.2.3. 필름의 제조 30
2.3. 분석 32
2.3.1. 분자량 측정 32
2.3.2. 구조분석 32
2.3.2.1 가지화도 32
2.3.2.2 PVA의 입체규칙성 33
2.3.2.3 PVA의 비누화도 33
2.3.2.4 PVA의 분자구조 분석 34
2.3.3 투과도 및 편광효율 측정 35
Ⅲ. 결과 및 고찰 37
3.1. PVA의 벌크 중합 37
3.1.1 GPC를 통한 PVAc와 PVA의 분자량 측정 37
3.1.2 GPC를 통한 PVA의 가지화도 39
3.1.3. 1H NMR spectrum 해석을 통한 PVA 특성 해석 40
3.1.3.1. 비누화도 40
3.1.3.2 입체규칙성 40
3.1.4. FT-IR을 통한 PVA의 구조 분석 44
3.2. UV-vis spectrum을 통한 PVA 편광필름의 광학적 특성 해석 46
3.2.1. 액정의 농도에 따른 편광필름의 광학적 특성 46
3.2.2. 전기장 세기에 따른 편광필름의 광학적 특성 49
3.2.3. 요오드화의 농도에 따른 편광필름의 광학적 특성 52
Ⅳ. 결 론 55
참고문헌 58
영문초록 61

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