高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (1): 166.

• 研究论文 • 上一篇    下一篇

中间嵌段为亲水性的BAB型三嵌段共聚物水溶液中初级聚集体的二次聚集行为研究

袁建军1,2, 杨子刚1, 程时远1, 江雷2, 封麟先3, 范志强3   

  1. 1. 湖北大学化学与材料科学学院, 武汉 430062;
    2. 中国科学院化学研究所, 北京 100080;
    3. 浙江大学高分子科学研究所, 杭州 310027
  • 收稿日期:2002-12-30 出版日期:2004-01-24 发布日期:2004-01-24
  • 通讯作者: 程时远(1942年出生),男,教授,博士生导师,从事高分子材料研究.E-mail:scheng@public.wh.hb.cn E-mail:scheng@public.wh.hb.cn
  • 基金资助:

    中国科学院有机固体重点实验室开放基金;国家“九七三”计划项目(批准号:G1999064505)资助

Studies on the Second Aggregation Behavior of Primary Aggregates from BAB Triblock Copolymers with a Hydrophilic Middle Block A in Aqueous Media

YUAN Jian-Jun1,2, YANG Zi-Gang1, CHENG Shi-Yuan1, JIANG Lei2, FENG Lin-Xian3, FAN Zhi-Qiang3   

  1. 1. College of Chemistry and Materials Science, Hubei University, Wuhan 430062, China;
    2. Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China;
    3. Institute of Polymer Science, Zhejiang University, Hangzhou 310027, China
  • Received:2002-12-30 Online:2004-01-24 Published:2004-01-24

摘要: 采用TEM和AFM研究了PS(聚苯乙烯)43-b-PEO(聚氧乙烯)45-b-PS43和PS39-b-P4VP(聚4-乙烯基吡啶)98-b-PS39三嵌段共聚物在水介质中的球形胶束、囊泡和蠕虫状胶束之间的二次聚集行为.实验发现,初级聚集体的二次聚集具有不同的复杂程度.对称性的初级聚集体,如球形胶束和囊泡,其二次聚集表现出球形对称性;而非对称性初级聚集体(如蠕虫状胶束)二次聚集开始倾向于非对称性.BAB型的嵌段设计有利于初级聚集体的二次聚集发生.

关键词: 嵌段共聚物, 自组装, 二次聚集, 囊泡

Abstract: The second aggregation behavior of spherical micelles, spherical vesicles and worm-like micelles made from PS43-b-PEO45-b-PS43 and PS39-b-P4VP98-b-PS39 triblock copolymers was investigated by conventional Transmission Electron Microscope(TEM) and Atomic Force Microscope(AFM) techniques. It was observed that the second aggregation behaved the different complexity for different primary aggregates. For the symmetrical primary aggregates, such as spherical micelles and vesicles, the second aggregates displayed a symmetrical sphere. In contrast, for the unsymmerical worm-like primary micelles, the second aggregation tended to have an unsymmetrical shape. The BAB chain architecture was molecularly suggested to be responsible for the second aggregation.

Key words: Block copolymer, Self-assembly, Second aggregation, Vesicle

中图分类号: 

TrendMD: