单体光交联制备液晶垂直取向膜

提出光敏单体紫外光聚合制备液晶垂直取向膜的方法，并在实验中证实了方法的可行性.实验中采用六氟双酚A双肉桂酸酯单体，在紫外光作用下单体发生光交联反应，形成的聚合膜能够诱导液晶分子垂直排列.制备过程简单，不需要高温热处理过程.从紫外吸收光谱和红外吸收光谱分析发现，单体具有较好的光敏性和聚合度.取向膜经过120℃高温处理仍然具有良好的取向性质. 关键词： 光敏单体 光交联 液晶 垂直取向膜 六氟双酚A双肉桂酸酯

Vertically aligned films for liquid crystals fabricated by monomer photo-crosslinking

A new method to fabricate vertically aligned films for liquid crystals was proposed and studied experimentally. Photosensitive monomers of hexafluorobiphenol A dicinnamic esters were crosslinked by exposure under ultraviolet light. The obtained films could induce vertical alignment of liquid crystals. The process of the film making was very simple and did not need annealing at high temperatures. UV-visible spectra and polarized FT-IR spectra revealed that the photo-crosslinking reaction happened and reaction degree was rather high after the exposure under ultraviolet light. The stability of the aligned film could be kept to 120℃.