中文摘要：

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ijn,《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。

英文摘要：

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.