An Azoester-containing Photoresponsive Linear Liquid Crystal Polymer with Good Mesophase Stability  

作　　者：Shu-Qiang Han Ying-Ying Chen Bo Xu Jia Wei Yan-Lei Yu 

机构地区：[1]Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers,Fudan University,Shanghai200433,China

出　　处：《Chinese Journal of Polymer Science》2020年第8期806-813,I0005,共9页高分子科学（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.21734003,51573029,51721002);Natural Science Foundation of Shanghai(No.17ZR1440100);Innovation Program of Shanghai Municipal Education Commission(No.2017-01-07-00-07-E00027).

摘　　要：Photoresponsive linear liquid crystal polymers(LLCPs)are attractive because of the excellent stimuli-responsibility and the good processability.In this study,a new photoresponsive LLCP containing azoester(PC11AE6)with good mesophase stability was synthesized by ringopening metathesis polymerization.By introducing photoresponsive azoester mesogenic unit,which has high rigidity and a large lengthdiameter ratio,the resultant polymer possesses a broad mesophase temperature interval(isotropic temperature=180℃).A study on mesophase by 2D-wide angle X-ray diffraction indicated that the mesogens were orientated spontaneously into smectic A phase after annealing.The orientated films and fibres exhibited macroscopic,rapid and reversible deformations under light irradiation as a result of the photoisomerization of azoester as confirmed by UV-Vis absorption spectrophotometry.We anticipate that this work provides a strategy for preparing LLCP with a broad mesophase temperature range,which is positive for potential applications.

关 键 词：Ring-opening metathesis polymerization Liquid crystal polymers Azoester Photodeformation 

分 类 号：TQ317[化学工程—高聚物工业]