THE EFFECT OF PHOTO-CROSSLINKING ON THE ORIENTATION STABILITY OF POLYVINYL ALCOHOL CONTAINING 4-NITRO-4′-ALKOXYSTILBENE AND CINNAMYL PENDENT GROUPS  

作　　者：冯知明 林伟平 叶成 

机构地区：[1]Organic Solid Lab., Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080 [2]Department of Physics, Northwestern University, Evanston, IL 60208, USA

出　　处：《Chinese Journal of Polymer Science》1997年第2期154-161,共8页高分子科学（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China

摘　　要：Crosslinking is one of the effective routes for improving the orientation stability of poled polymer films. The derivative of polyvinyl alcohol containing 4-nitro-4'-alkoxystilbene and photo-crosslinkable cinnamyl groups as side chains has been synthesized. The in-situ simultaneous photo-crosslinking poling of synthesized polymer films has teen performed, The second order nonlinear optical coefficient d(33) of poled film is 11 pm/V. The SHG measurements show that the break-over temperature of SHG signal is raised obviously after irradiation, its orientation stability is doubled as compared with that of non-crosslinking samples.Crosslinking is one of the effective routes for improving the orientation stability of poled polymer films. The derivative of polyvinyl alcohol containing 4-nitro-4'-alkoxystilbene and photo-crosslinkable cinnamyl groups as side chains has been synthesized. The in-situ simultaneous photo-crosslinking poling of synthesized polymer films has teen performed, The second order nonlinear optical coefficient d(33) of poled film is 11 pm/V. The SHG measurements show that the break-over temperature of SHG signal is raised obviously after irradiation, its orientation stability is doubled as compared with that of non-crosslinking samples.

关 键 词：PHOTO-CROSSLINKING in-situ simultaneous photo-crosslinking poling nonlinear optical polymer SHG orientation stability 

分 类 号：TQ317[化学工程—高聚物工业]