새로운 덴드리머 타입의 가지재 개발 : Polysiloxane 기반의 hybrimer의 합성 및 광학 특성분석
- Issued Date
- 2014
- Abstract
- phenyl-vinyl-oligosiloxane (PVO) resins have been was synthesized by nonhydrolytic sol-gel condensation process from the reaction of vinyltrimethoxysilane (VTMS) and diphenylsilanediol (DPSD). Barium hydroxide monohydrate was used as a catalyst and promotes the direct condensation reaction between the methoxy radical of VTMS and diol radical of DPSD from siloxane bonds. The 1,3,5-tris(dimethylhydrosilyl)benzene (TDMSB) as crosslinking agent was synthesized through the in situ Grignard reactions of 1,3,5-tribromobenzene with chlorodimethylsilane. The synthesized PVO were thermal cured with a cross-linker, TDMSB, through a hydrosilylation reaction under a Pt catalyst, Platinum cyclovinylmethyl-siloxane complex (Pt0․[CH2=Ch(Me)SiO]4). The resulting polysiloxane-based hybrimer has a high refractive index of 1.57 and good transmittance of 97 ~ 98 % at 460 nm, after thermal curing at 180℃ for 2 h, which is the most important optical properties for the photo-extraction efficiency of LED encapsulant
- Alternative Title
- Development of New Dendrimer Type of Crosslinking Agent : Synthesis and Optical Characterization of Polysiloxane-Based Hybrimer
- Alternative Author(s)
- Kim, Jong Jun
- Department
- 일반대학원 화학과
- Advisor
- 손홍래
- Awarded Date
- 2014-08
- Table Of Contents
- TABLE OF CONTENTS ⅰ
LIST OF SYMBOLS AND ABBREVIATIONS ⅱ
LIST OF TABLE ⅲ
LIST OF SCHEMES ⅳ
LIST OF FIGURES ⅴ
ABSTRACT ⅶ
1. Introduction 1
2. Experiment 3
2.1. Generals 3
2.2 Synthesis 3
2.2.1. Preparation of Phenyl-vinyl-oligosiloxane 3
2.2.1.1. Synthesis of diphenylsilanediol 3
2.2.1.2. Synthesis of Phenyl-vinyl-oligosiloxane resin 4
2.2.2. Synthesis of 1,3,5-tris(dimethylhydrosilyl)benzene 5
2.2.3. Fabrication of hybrimer resins using TDMSB as crosslinking agent 6
2.2.4. Fabrication of hybrimer Thin film using TDMSB as crosslinking agent 7
3. Results and Discussion 8
3.1. measurements 8
3.2. Synthesis and Characterization of Phenyl-vinyl-oligosiloxane (PVO) resins 8
3.3. Synthesis and Characterization of 1,3,5-tris(dimethylhydrosilyl)benzene (TDMSB) 9
3.4. Synthesis and Characterization of hybrimer resin using TDMSB 10
3.4.1. Thermal aging of hybrimer resin via hydrosilylation reaction 10
3.5. Optical properties of hybrimer resin 14
3.5.1. Transmittance 14
3.5.2. Reflective index 14
3.6. Physical and Thermal properties of hybrimer resin 15
3.6.1. Hardness 15
3.6.2. TGA 15
3.6.3. Yellowness and Transmittance of aging for 24,48,72 h at 180, 200℃ 16
4. Conclusion 20
5. Reference 21
6. Appendix 22
- Degree
- Master
- Publisher
- 조선대학교 대학원
- Citation
- 김종준. (2014). 새로운 덴드리머 타입의 가지재 개발 : Polysiloxane 기반의 hybrimer의 합성 및 광학 특성분석.
- Type
- Dissertation
- URI
- https://oak.chosun.ac.kr/handle/2020.oak/12275
http://chosun.dcollection.net/common/orgView/200000276291
- Appears in Collections:
- General Graduate School > 3. Theses(Master)
- Files in This Item:
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새로운 덴드리머 타입의 가지재 개발 : Polysiloxane 기반의 hybrimer의 합성 및 광학 특성분석.pdf
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