高稳定性的偶氮聚合物薄膜光致取向与弛豫的研究  

Photoinduced birefringence and relaxation of film in a highly stable azobenzene containing copolymer

作　　者：雷张源[1] 黄金堂[1] 吴思[2] 张其锦[2] 王克逸[1] 

机构地区：[1]中国科学技术大学工程科学学院精密机械与精密仪器系,安徽合肥230027 [2]中国科学技术大学化学与材料科学学院高分子科学与工程系,安徽合肥230027

出　　处：《红外与激光工程》2011年第8期1499-1502,共4页Infrared and Laser Engineering

基　　金：国家自然科学基金(50875251)

摘　　要：合成了一种新型的偶氮聚合物,它是由吡啶基团和4-腈基-4′-羟基偶氮苯聚合而成。搭建了偶氮聚合物薄膜光致双折射探测光路系统,并测量了吡啶基团和4-腈基-4′-羟基偶氮苯的摩尔比分别为0,0.25,0.5,0.75,1的偶氮聚合物薄膜的光致取向和弛豫曲线,并做了反复写入和擦除实验以及老化实验。实验结果表明:这种偶氮吡啶聚合物光致取向十分稳定,两种单体的摩尔比越高,偶氮聚合物双折射值越大。值得关注的是摩尔比低于50%时,偶氮聚合物薄膜弛豫表现为曲线缓慢下降最后趋向平衡。而当摩尔比高于50%时,偶氮聚合物关闭泵浦光后曲线缓慢上升最后趋向平衡,这个实验结果说明了摩尔比超过50%的偶氮聚合物其保存写入信息的能力增强了,因而也更稳定了。A new azobenzene containing copolymer, which is polymerized by 4-（（4-hydroxyphenyl）diazenyl） benzonitrile and poly （6-（4-（pyridin-4-yldiazenyl）phenoxy）hexyl methacrylate）, was synthesized in this paper. A linearly polarized light inducing device was set up and the photoinduced birefringence and relaxation curve of the azobenzene containing copolymer with different molar ratio （0, 0.25, 0.5, 0.75, 1） were measured. Aging test and repeated writing and erasing test were carried out. Experimental results show this copolymer is very stable, the larger the molar ratio, the higher the photoinduced birefringence. It is a notable case when the molar ratio is less than fifty percent, the relaxation curve declines firstly and then keeps changeless basically. But when the molar ratio is larger than fifty percent, the relaxation curve rises firstly and then keeps changeless basically. It comes to the conclusion that the sample with the molar ratio lager than fifty percent is more stable and has higher capability of saving written information.

关 键 词：功能材料 光致取向 弛豫 偶氮聚合物 

分 类 号：O631.2[理学—高分子化学]