作　　者： ; ;

机构地区： 中山大学化学与化学工程学院高分子研究所

出　　处： 《高分子学报》 1996年第6期740-744,共5页

摘　　要： 功能化线型聚氨酯的合成及其二阶非线性光学特性的研究＊颜星中陈用烈梁兆熙＊＊（中山大学高分子研究所广州５１０２７５）蔡志岗杨佩青徐志凌李鹏（中山大学国家超快速激光光谱重点实验室广州５１０２７５）关键词４’－（Ｎ，Ｎ二羟乙基）－氨基－４－硝基偶氮苯，聚氨... Chromophores (R-HANB) with “push-pull”structures,based on 4-(N,N′-dihydroxyethyl) amino-4-nitroazobenzene (HANB) has been designed and synthesized.Linear polyurethanes with high second-order nonlinear optical activity were obtained through their reaction with toluene diisocyanate (2,4isomer).The second harmonic generation temperal stability of poled polyurethane films was in the following order at the same temperature: o-CH 3-HANB>HANB>o-OCH 3-HANB≈m Cl HANB,which could be explained by the effect of the free volume of the thermal motion for chromophores and the thermotropic interaction due to polarizability anisotropy of dipoles in films.

关 键 词： 聚氨酯 二次谐波 聚合物

领　　域： [理学] [理学]