標題: Preparation of liquid-crystal thermosets: In situ photopolymerization of oriented liquid-crystal diacrylates
作者: Hsu, CS
Chen, HL
應用化學系
Department of Applied Chemistry
關鍵字: liquid-crystal network;photopolymerization;compensation film
公開日期: 1-十一月-1999
摘要: The photoinitiated polymerization of 2-chloro-1,4-phenylene bis[4-[6-(acryloyloxy)hexyloxy]benzoate] (1M) was studied. The monomer 1M exhibited a broad nematic phase between 24.9 and 113.7 degrees C on a DSC cooling scan. It was oriented in its nematic phase at a substrate coated with polyimide and unidirectionally rubbed with a nylon cloth. During polymerization, the ordering of the liquid-crystal molecules was fixed, yielding a uniaxially crosslinked network. The clear liquid-crystal networks (LCNs) exhibited a birefringence between 0.14 and 0.19, depending on the polymerization temperature. Finally, a nonmesogenic diluent, tetra(ethylene glycol)diacrylate, was mixed with 1M, subsequently decreasing the birefringence of the obtained LCNs. The LCNs containing nonmesogenic diluent exhibited not only a smaller birefringence but also a weaker birefringence dispersion in the visible region. (C) 1999 John Wiley & Sons, Inc.
URI: http://hdl.handle.net/11536/30992
http://dx.doi.org/10.1002/(SICI)1099-0518(19991101)37:21<3929
ISSN: 0887-624X
DOI: 10.1002/(SICI)1099-0518(19991101)37:21<3929
期刊: JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
Volume: 37
Issue: 21
起始頁: 3929
結束頁: 3935
顯示於類別:期刊論文


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