Preparation of liquid-crystal thermosets: in situ photopolymerization of oriented liquid-crystal diacrylates

Chain-Shu Hsu, Hwai Len Chen

研究成果: Article

32 引文 斯高帕斯(Scopus)

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°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.

原文English
頁(從 - 到)3929-3935
頁數7
期刊Journal of Polymer Science, Part A: Polymer Chemistry
37
發行號21
DOIs
出版狀態Published - 1 十一月 1999

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