Photoinduced orientation in azopolymers studied by infrared spectroscopy: Cooperative and biaxial orientation in semicrystalline polymers

被引:45
作者
Buffeteau, T
Pezolet, M [1 ]
机构
[1] Univ Laval, Dept Chim, Ctr Rech Sci & Ingn Macromol, Quebec City, PQ G1K 7P4, Canada
[2] Univ Bordeaux 1, Spect Mol & Cristalline Lab, F-33405 Talence, France
关键词
D O I
10.1021/ma971414o
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
A disperse red 19-containing semicrystalline azopolymer (pDR19T) with phenylene diacrylate (PD) groups within the main chain has been studied by polarization modulation and two-dimensional correlation infrared spectroscopy. The time dependence of the orientation function of azobenzene and PD groups has been followed during the orientation (linearly polarized laser on) and relaxation (laser off) periods. The results show a high degree of orientation of the different groups perpendicular to the direction of the laser polarization and a cooperative orientation of the PD groups with the azobenzene side chains. The azobenzene groups are not randomly oriented in the plane normal to the direction of the laser polarization leading to a biaxial orientation distribution. This photoinduced biaxiality has been quantified for pDR19T polymer and for amorphous copolymers containing azobenzene and methyl methacrylate structural units.
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页码:2631 / 2635
页数:5
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