苯乙烯-p-乙烯基苯甲酸两亲性嵌段共聚物在乙醇中自组装行为的电镜观察  

STUDY ON SELF-ASSEMBLY OF POLYSTYRENE-b-POLYVINYLBENZOIC ACID IN ETHANOL

作　　者：魏柳荷[1] 张炜程[1] 陈宇[1] 朱明强[1] 杜福胜[1] 李子臣[1] 李福绵[1] 

机构地区：[1]北京大学化学与分子工程学院高分子科学与工程系,北京100871

出　　处：《高分子学报》2002年第4期548-551,共4页Acta Polymerica Sinica

基　　金：国家自然科学基金项目 (基金号 5 0 0 0 3 0 0 1);教育部博士点研究基金项目 (项目号 990 0 0 13 1)

摘　　要：Self assembly of an amphiphilic diblock copolymer polysyrene b polyvinylbenzoic acid in ethanol,which is a selective solvent for the polybenzoic acid segment was studied by means of transmission electron microscopy.The diblock copolymers can self assemble into nano scale aggregates with polystyrene segment as the core and polyvinylbenzoic acid segment as the corona.The morphology of the aggregates is mainly controlled by the ratio of the two segment of the diblock copolymer.As the content of the ethanol insoluble polystyrene segment increased,the morphology can be changed from spheres to rods.The diameter of the aggregates increases slightly with concentration and decreases with the addition of CoCl 2 salt.Self-assembly of an amphiphilic diblock copolymer polysyrene-b-polyvinylbenzoic acid in ethanol, which is a selective solvent for the polybenzoic acid segment was studied by means of transmission electron microscopy. The diblock copolymers can self-assemble into nano scale aggregates with polystyrene segment as the core and polyvinylbenzoic acid segment as the corona. The morphology of the aggregates is mainly controlled by the ratio of the two segment of the diblock copolymer. As the content of the ethanol-insoluble polystyrene segment increased, the morphology can be changed from spheres to rods. The diameter of the aggregates increases slightly with concentration and decreases with the addition,of CoCl2 salt.

关 键 词：苯乙烯-p-乙烯基苯甲酸 两亲性嵌段共聚物 乙醇 电镜 胶束 自组装 

分 类 号：O631[理学—高分子化学]