PEG链段对聚乙二醇接枝聚苯胺结构与性能的影响  

EFFECT OF PEG SEGMENTS ON THE MICROSTRUCTURE AND PROPERTIES OF POLY(ETHYLENE GLYCOL)-GRAFTED POLYANILINE

作　　者：马会茹[1] 官建国[1] 柳娜[1] 卢国军[1] 袁润章[1] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,武汉430070

出　　处：《高分子学报》2006年第1期92-96,共5页Acta Polymerica Sinica

基　　金：国家自然科学基金资助项目(基金号29904005)

摘　　要：将苯胺(An)与甲氧基聚乙二醇邻氨基苯基醚氧化共聚,制备了梳状接枝共聚物PAn-g-PEG.研究了梳状接枝共聚物的UV-Vis、微观结构、热稳定性和溶解成膜性等随侧链聚乙二醇(PEG)链段的变化规律.结果表明随PAn-g-PEG中PEG链段长度和含量的提高,共聚物的溶解性和成膜性能显著提高,电子导电率缓慢降低,热稳定性变差.共聚物具有微相分离结构,其形态随PEG链段的改变分别为“海-岛相”和“双连续相”;提高PEG链段长度和含量,PAn-g-PEG能形成稳定的水溶性分散体系,并能浇注成柔韧平整的导电高分子自支撑膜.The comb-shaped copolymers PAn-g-PEG were prepared by chemical oxidation copolymerization of aniline and methoxyl poly（ ethylene glycol） o-aminophenyl ether. The UV-visible spectra, microstructures, thermal stabilities, solubility and film-forming properties of the copolymers were investigated as functions of side-chain poly（ethylene glycol） （PEG） segments. The results show that when the PEG segments length or its content in the grafted copolymers are increased, the solubility and film-forming property of PAn-g-PEG improve remarkably, and the electrical conductivity decreases slowly, while the thermal stability becomes worse. TEM images indicate that the copolymers exhibit microphase separation and morphology change from the ＂sea-island＂ mode to the ＂bicontinuous＂ one with increasing the length or content of the PEG segments. A soft and smooth conducting polymeric film can be directly obtained by casting the stable aqueous dispersion of PAn-g-PEG, which becomes water-soluble when the PEG segments length or content are increased.

关 键 词：聚苯胺 聚乙二醇 接枝共聚物 溶解性 成膜性 

分 类 号：O633.2[理学—高分子化学]