Effects of functionality of thiol monomer on electro-optical properties of polymer-dispersed liquid crystal films |
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| Authors: | Yujian Sun Cuihong Zhang Hui Cao Fasheng Li |
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| Institution: | 1. Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, People’s Republic of China;2. Anshan Normal University, Anshan, Liaoning Province, People’s Republic of China;3. Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, People’s Republic of China;4. College of Medical Laboratory, Dalian Medical University, Dalian, Liaoning Province, People’s Republic of China |
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| Abstract: | In this paper, polymer-dispersed liquid crystal (PDLC) films which based on the acrylate and the thiol monomers were first prepared by ultraviolet-initiated polymerisation. The electro-optical properties and morphologies of the PDLC films were systematically investigated. The functionality of thiol monomers and their feed ratio showed great influence on the properties of the fabricated PDLC films because of the existence of competition between thiol–acrylate reaction and acrylate monomer polymerisation reaction. This made the polymer network and electro-optical properties of the PDLC films easily tunable by the introduction of the thiol monomers. When added four-functional thiol monomer PETMP with appropriate concentration into the PDLC system, lower driven voltage and higher contrast ratio were achieved. |
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| Keywords: | Polymer-dispersed liquid crystal electro-optical properties liquid crystals morphology photopolymerisation |
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