Deformation of amorphous azobenzene-containing polymer films induced by polarized light

被引：5
|
作者：
He, Ling-Hui [1 ]
机构：
[1] Univ Sci & Technol China, CAS Key Lab Mech Behav & Design Mat, Hefei 230026, Peoples R China
来源：
ACTA MECHANICA SINICA | 2012年 / 28卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Amorphous polymer; Azobenzene side-chain; Photo-induced deformation; PHOTOINDUCED ANISOTROPY; FUNCTIONALIZED POLYMERS; MODEL; TRANSPORT; GRATINGS;
D O I：
10.1007/s10409-012-0132-5
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Photomechanical response of amorphous polymer films containing azobenzene chromophores in side chains is studied. By invoking the trans-cis isomerization mechanism, the steady-state deformation of the film induced by uniform illumination of linearly polarized light is obtained analytically. The deformation turns out to be of entropic origin, produced to compensate the entropy decrease due to photo-induced redistribution of azobenzene chromophores normal to the polarization direction. The predicted elongation direction of the film is consistent with previous experimental observations.
引用
收藏
页码：1203 / 1208
页数：6
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