侧基含偶氮基的硅氧烷梳状聚合物的光致变色性  

Photochromism of Comb-Like Polysiloxane Polymers Containing Azobenzene Side Groups

作　　者：张静智[1] 张其震[1] 

机构地区：[1]山东大学化学系,济南250100

出　　处：《化学学报》1997年第9期930-936,共7页Acta Chimica Sinica

基　　金：国家自然科学基金资助课题

摘　　要：本文研究了对十一烯酰胺基偶氮苯及其硅氧烷均聚、共聚的梳状聚合物在溶液或薄膜状态下的光致变色性和热回复性.它们的反、顺异构体组分比随光照时间趋於某稳定值,该稳定的组分比与照射光波长有关.光异构反应是可逆的.比较了异构反应速率和异构转换率,以聚硅氧烷共聚物PSll_3A[侧基比(M_1/M_2)=1/9,M_是对十一烯酰胺基偶氮苯,M_2是对十一烯酰氧对甲氧基苯酯]为最佳.升高温度能增进热回复异构.This paper describes the photochromism and thermal back - isomerization of 4 -undecylen - [ 10 ] - amidoazobenzene and its homo - and copolysiloxanes in solution and solid film. The composition ratio of cis/tran isomers tends to be constant in with irradiation time. The photostationary state composition is only related to irradiation wave length. The photoisomerization reaction is reversible. The copolysiloxane PSII3A [the ratio of fed monomers (M1/M2 ) = 1/9, M1 is 4 - undecylen - [ 10 ] - amidoazobenzene, M2 is methyl 4 -undecylenoylbenzoate] is the best in regard to photoisomerization reaction rate and photoisomerization conversion percentage. The thermal back- isomerization can be enhanced when temperature is elevated.

关 键 词：聚硅氧烷 梳状聚合物 光致变色 光异构 

分 类 号：O635.1[理学—高分子化学]