【摘要】 通过原子转移自由基聚合(ATRP)技术合成乙基纤维素接枝偶氮苯聚合物。以功能化乙基纤维素作为大分子引发剂,在CuBr/N,N,N′,N″,N″-五甲基二亚乙基三胺(PMDETA)催化体系下,以苯甲醚为溶剂,引发对甲氧基偶氮苯单体6-[4-(4-甲氧基苯基偶氮)酚氧基]已基甲基丙烯酸酯(MMAzo)的ATRP反应,构筑接枝共聚物。通过多种手段接枝共聚物结构、热行为与液晶性进行表征。接枝共聚物在紫外-可见光照射下发生可逆的顺反异构化反应,具有作为光学材料的潜力。更多还原

【Abstract】 Atom transfer radical polymerization(ATRP)was employed to synthesize graft copolymers of ethyl cellulose with azobenzene.The functional ethyl cellulose was utilized as a macroinitiator in the ATRP of 6-[4-(4- methoxyphenylazo)phenoxy]hexyl methycrylate(MMAzo)in anisole in conjunction with CuBr/N,N,N′,N″, N″-pentamethyldiethylenetriamine (PMDETA) as a catalyst system.The graft copolymers were characterized and investigated by means of gel permeation chromatography(GPC),~1H NMR,differemtial scanning carorime- try(DSC),and polarized optical microscope(POM).The graft copolymers exhibit photoisomerization under UV-vis light irradiation and have the potential as photoactive material.更多还原