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Effect of Urethane Acrylate Oligomer and UV Curing Temperature on Electro-Optical Property of Polymer-Dispersed Liquid Crystal

Title
Effect of Urethane Acrylate Oligomer and UV Curing Temperature on Electro-Optical Property of Polymer-Dispersed Liquid Crystal
Authors
Chung, SH[Chung, Seok-Hwan]Gil, EK[Gil, Eun-Kyung]Noh, HY[Noh, Hee-Yeon]Jeong, SM[Jeong, Soon Moon]Choi, B[Choi, Byeongdae]
DGIST Authors
Chung, SH[Chung, Seok-Hwan]; Gil, EK[Gil, Eun-Kyung]; Noh, HY[Noh, Hee-Yeon]; Jeong, SM[Jeong, Soon Moon]Choi, B[Choi, Byeongdae]
Issue Date
2014-09-22
Citation
Molecular Crystals and Liquid Crystals, 601(1), 1-10
Type
Article
Article Type
Article
Keywords
CuringElectro-Optical PropertiesElectro-Optical PropertyEstersLiquid Crystal-PolymersLiquid Crystal DisplaysLiquid CrystalsLiquidsOligomersOptical PropertiesPhoto-PolymerizationPlastic FilmsPolymer-Dispersed Liquid Crystal (PDLC)Polymer Dispersed Liquid Crystals (PDLC)Polymer FilmsPre-PolymerPre-PolymersUrethane AcrylateUV-CuringUV Curing Temperature
ISSN
1542-1406
Abstract
Polymer-dispersed liquid crystal (PDLC) films were prepared by photopolymerization after substituting the reactive diluent monomer 2-ethylhexyl acrylate with an aliphatic urethane acrylate (UA) oligomer in a conventional pre-polymer (PN393). The effects of UA concentration and UV curing temperature on the PDLC films' physical properties were examined. The average LC droplet size decreased with increasing UA concentration. The driving voltage decreased by 30% and the response time increased by 26%. The PDLC films with 30 wt% of UA showed the lowest driving voltage and the highest contrast ratio when the LC pre-polymer mixture was UV-cured slightly above the nematic-isotropic coexistence temperature. © Taylor & Francis Group, LLC.
URI
http://hdl.handle.net/20.500.11750/3032
DOI
10.1080/15421406.2014.940486
Publisher
Taylor and Francis Ltd.
Related Researcher
Files:
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Collection:
Convergence Research Center for Solar Energy1. Journal Articles
Intelligent Devices and Systems Research Group1. Journal Articles


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