고분자분산액정 시스템의 광중합, 상분리 거동
- Issued Date
- 2009
- Abstract
- Polymer dispersed liquid crystal (PDLC) films is a composite having low molecular weight liquid crystal microdroplets dispersed in a polymer matrix. Due to its attractive electro-optical characteristic, it has potential applications in switchable glass, optical and display industry. Photopolymerization-induced phase separation (PIPS) process is a preferred and versatile method to make PDLC film due to its simple manufacturing process and reliable electro-optical performances.
PIPS process is the core in PDLC technology. It is a critical factor to form a morphology of PDLC film, by which the electro-optical performances are determined. In order to achieve the optimized electro-optical performances of a PDLC film, it is essential to understand the underlying mechanisms on PIPS process.
The aim of this research is to provide fundamental knowledge on PIPS process and technical issues for enhancement of PDLC performances, which were implemented by four consecutive approaches as followings:
(1) Experimental technique to monitor PIPS process
(2) Structural factors in liquid crystal materials to PIPS process
(3) Structural factors in polymer components to PIPS process
(4) Correlation among chemical nature of liquid crystal and prepolymer components, PIPS process, morphology and electro-optical properties of PDLC films
(5) Construction of driving electrodes using conducting polymer thin films for improved flexibility.
- Alternative Title
- Photopolymerization and Phase Separation Behavior of Polymer Dispersed Liquid Crystals
- Alternative Author(s)
- Park Sucheol
- Department
- 일반대학원 고분자공학과
- Advisor
- 홍진후
- Awarded Date
- 2009-08
- Table Of Contents
- Chapter 1
Introduction
1-1. Polymer Dispersed Liquid Crystal
1-2. Liquid Crystal-Polymer Phase Separation
1-2-1 Phase Diagrams
1-2-2 Phase Separation in the Binodal and Spinodal Regimes
1-2-3 Calculation of Phase Diagrams
1-2-4 Effect of Phase Separation Kinetics on Morphology
1-3. Objectives
1-4. References
Chapter 2
Monitoring the Photopolymerization Reaction and the Phase Separation Process during the PDLC Formation Procedure
2-1 Introduction
2-2 Experimental
2-2 Experimental
2-2-1 Materials
2-2-2 FTIR measurement
2-2-3 Photo-DSC measurement
2-2-4 DSC measurement
2-2-5 Resistance and transmittance measurement of PDLC cells
2-3 Results and Discussions
2-4. Summary
2-5 References
Chapter 3
Effect of Liquid Crystal Structures on Photopolymerization and Phase Separation Behaviors in PDLC
3-1 Introduction
3-2 Experimental
3-2-1 Materials
3-2-2 Measurements
3-3 Results and Discussions
3-4 Summary
3-5 References
Chapter 4
Effect of Prepolymer Structures on Photopolymerization-induced Phase Separation Process, Morphology and Electro-optical Properties of PDLC Films
4-1 Introduction
4-2 Experimental
4-2-1 Materials
4-2-2 Measurements
4-3 Results and Discussions
4-3-1 Effect of Stoichiometric Ratio
4-3-2 Effect of Matrix Crosslink Density
4-4 Summary
4-5 References
Chapter 5
Fabrication of Polymer Dispersed Liquid Crystal Films using Conducting Polymer Thin Films as Driving Electrodes
5-1 Introduction
5-1 Experimental
5-2-1 Materials
5-2-2 Preparation of the Conductive Films with PEDOT
5-2-3 Characterization
5-2-4 Fabrication of PDLC device using Conducting Polymer Thin Films
5-3 Results and Discussions
5-3-1 Preparation of Conducting Thin Films using PEDOT
5-3-2 Characterization of Conducting Thin Films
5-3-3 Fabrication of PDLC device using Conducting Polymer Thin Films
5-4 Summary
5-5 References
Chapter 6
Polymer Dispersed Liquid Crystal Film for Variable-transparency Glazing
6-1 Introduction
6-1 Experimental
6-2-1 Sample Preparation
6-2-2 Optical Measurements
6-2-3 Durability
6-3 Results and Discussions
6-4 Summary
6-5 References
- Degree
- Doctor
- Publisher
- 조선대학교 대학원
- Citation
- 박수철. (2009). 고분자분산액정 시스템의 광중합, 상분리 거동.
- Type
- Dissertation
- URI
- https://oak.chosun.ac.kr/handle/2020.oak/8240
http://chosun.dcollection.net/common/orgView/200000238316
- Appears in Collections:
- General Graduate School > 4. Theses(Ph.D)
- Files in This Item:
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