Effect of Spacer Length on Photoinduced Reorientation Behavior of Photocrosslinkable Liquid Crystalline Polymer Films Comprising 4-(4-Methoxycinnamoyloxy)biphenyl Side Groups
作者:Nobuhiro Kawatsuki、Junpei Horii
DOI:10.1080/15421400802612136
日期:2009.2.25
Methacrylate polymer liquid crystals containing 4-(4-methoxycinnamoyloxy)biphenyl (MCB) side group with different alkylene spacer length between the polymethacrylate backbone and MCB side groups are synthesized. Influence of the alkylene spacer length on the thermally enhanced molecular reorientation behavior of thin films is investigated using linearly polarized ultraviolet (LPUV) light exposure and
合成了含有4-(4-甲氧基肉桂酰氧基)联苯(MCB)侧基的甲基丙烯酸酯聚合物液晶,在聚甲基丙烯酸酯主链和MCB侧基之间具有不同的亚烷基间隔基长度。使用线性偏振紫外 (LPUV) 曝光和随后的退火研究亚烷基间隔物长度对薄膜的热增强分子重新取向行为的影响。当亚烷基间隔基短且诱导的面内有序参数大于0.6时,面内重新取向优先发生。另一方面,当亚烷基间隔物很长时,观察到热诱导的面外重定向以及面内重定向。