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Molecules 2017, 22(1), 43; doi:10.3390/molecules22010043

Effect of a Polymercaptan Material on the Electro-Optical Properties of Polymer-Dispersed Liquid Crystal Films

1
Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
2
Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
3
Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, China
4
Department of Applied Statistics and Science, Xijing University, Xi’an 710123, Shaanxi Province, China
5
Department of Applied Mechanics, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
6
College of Medical Laboratory, Dalian Medical University, Dalian 116044, Liaoning Province, China
*
Authors to whom correspondence should be addressed.
Academic Editors: Youngkyoo Kim and Hwajeong Kim
Received: 1 December 2016 / Revised: 21 December 2016 / Accepted: 27 December 2016 / Published: 30 December 2016
(This article belongs to the Special Issue Advances in Organic Nanophotonics)
View Full-Text   |   Download PDF [6750 KB, uploaded 30 December 2016]   |  

Abstract

Polymer-dispersed liquid crystal (PDLC) films were prepared by the ultraviolet-light-induced polymerization of photopolymerizable monomers in nematic liquid crystal/chiral dopant/thiol-acrylate reaction monomer composites. The effects of the chiral dopant and crosslinking agents on the electro-optical properties of the PDLC films were systematically investigate. While added the chiral dopant S811 into the PDLC films, the initial off-state transmittance of the films was decreased. It was found that the weight ratio among acrylate monomers, thiol monomer PETMP and the polymercaptan Capcure 3-800 showed great influence on the properties of the fabricated PDLC films because of the existence of competition between thiol-acrylate reaction and acrylate monomer polymerization reaction. While adding polymercaptans curing agent Capcure 3-800 with appropriate concentration into the PDLC system, lower driven voltage and higher contrast ratio were achieved. This made the polymer network and electro-optical properties of the PDLC films easily tunable by the introduction of the thiol monomers. View Full-Text
Keywords: polymer-dispersed liquid crystal; morphology; electro-optical properties; photopolymerization polymer-dispersed liquid crystal; morphology; electro-optical properties; photopolymerization
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Sun, Y.; Zhang, C.; Zhou, L.; Fang, H.; Huang, J.; Ma, H.; Zhang, Y.; Yang, J.; Zhang, L.-Y.; Song, P.; Gao, Y.; Xiao, J.; Li, F.; Li, K. Effect of a Polymercaptan Material on the Electro-Optical Properties of Polymer-Dispersed Liquid Crystal Films. Molecules 2017, 22, 43.

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