Analysis of Photoinduced Change in Properties on Macroscopic Motion of Crosslinked Azobenzene Liquid-CrystallinePolymers
Analysis of Photoinduced Change in Properties on Macroscopic Motion of Crosslinked Azobenzene Liquid-CrystallinePolymers
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交联偶氮苯液晶聚合物宏观运动光致性质变化分析
DOI：
10.1080/15421406.2011.600213
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
A. Shishidoand T. Ikeda
中科院分区：
文献类型：
--
作者：
A. Shimamura;J. Mamiya;A. Shishidoand T. Ikeda
通过原位光聚合制备了交联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。当暴露于紫外光时，薄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，弯曲的薄膜也恢复到初始平坦状态。此外，双折射率同时降低，并且在UV照射下产生应力。这些结果表明，薄膜中的分子排列因偶氮苯部分的反式-顺式光异构化而变得无序，由此产生的薄膜收缩产生应力。
Crosslinked azobenzene liquid-crystalline polymer films have been prepared byin-situphotopolymerization, 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 bytrans-cisphotoisomerization of the azobenzene moieties and the resultant contraction of the film generates the stress.