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首页> 外文期刊>Molecular Crystals and Liquid Crystals >Analysis of Photoinduced Change in Properties on Macroscopic Motion of Crosslinked Azobenzene Liquid-Crystalline Polymers
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Analysis of Photoinduced Change in Properties on Macroscopic Motion of Crosslinked Azobenzene Liquid-Crystalline Polymers

机译：交联的偶氮苯液晶聚合物的宏观运动光致性能变化分析

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摘要

Crosslinked azobenzene liquid-crystalline polymer films have been prepared by in-situ photopolymerization, and their photoinduced changes in birefringence and stress on macroscopic motion were investigated. Upon exposure to UV light, the film bent toward an actinic light source along the rubbing direction, and the bent film also reverted to the initial flat state after exposure to visible light at room temperature. Moreover, the birefringence simultaneously decreased and the stress was generated upon UV irradiation. These results indicate that the molecular alignment in the film becomes disordered by trans-cis photoisomerization of the azobenzene moieties and the resultant contraction of the film generates the stress.
机译：通过原位光聚合制备了交联的偶氮苯液晶聚合物薄膜，并研究了其光致双折射和宏观运动应力的变化。在暴露于UV光时，该膜沿摩擦方向向光化光源弯曲，并且在室温下暴露于可见光后，该弯曲的膜也恢复到初始平坦状态。此外，双折射同时降低，并且在紫外线照射下产生应力。这些结果表明，偶氮苯部分的反式-顺式光致异构化使膜中的分子排列无序，并且膜的收缩产生应力。

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