高等学校化学学报

高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (10): 1978.

• 研究简报 • 上一篇    

用SAXS/WAXS研究聚氧乙烯/聚氧丁烯嵌段共聚物在n-己烷中的结晶性球形胶束结构

徐君庭1, 梁国栋1, Ryan Anthony J.2   

  1. 1. 浙江大学高分子科学与工程学系, 杭州310027;
    2. Chemistr y D epar tment, T he U niv ersit y of Sheffield, Sheffield S3 7HF, U K
  • 收稿日期:2003-07-29 出版日期:2004-10-24 发布日期:2004-10-24
  • 基金资助:

    国家自然科学基金(批准号:20374046);教育部优秀青年教师资助计划项目资助

SAXS/WAXS Studies on Structure of Spherical Micelles Formed by Poly(oxyethylene)/poly(oxybutylene) Block Copolymers in n-Hexane

XU Jun-Ting1, LIANG Guo-Dong1, Mai Shao-Min2, Ryan Anthony J.2   

  1. 1. Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China;
    2. Chemistry Department, The University of Sheffield, Sheffield S3 7HF, UK
  • Received:2003-07-29 Online:2004-10-24 Published:2004-10-24

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关键词: 胶束, SAXS, WAXS, 聚氧乙烯/聚氧丁烯嵌段共聚物

Abstract: The structure of micelles formed by two poly(oxyethylene)/poly(oxybutylene) block copolymers, E76B38 and E155B76, in n-hexane at 50 ℃ was studied by synchrotron Small Angle X-ray Scattering(SAXS) and Wide Angle X-ray Scattering(WAXS). Spherical micelle with a crystalline core was observed for E155B76. E76B38 also formed spherical micelles, but the core was amorphous. The radius of the core(R), the length of the amorphous chain in the shell(L) and the number of association(N) were obtained by fitting the SAXS data with the model of a spherical core attached with Gaussian chains. The result showed that the E block exhibited multiple folds. The B block tended to be more coiled and the area occupied by per chain was larger in the micelles of E155B76, which are favorable to the formation of spherical micelles.

Key words: Micelle, SAXS, WAXS, Poly(oxyethylene)/poly(oxybutylene) block copolymer

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