接枝共聚物聚苯乙烯－g－聚氧乙烯的微相分离形态研究

STUDY ON THE MICROPHASE SEPARATION MORPHOLOGY OF POLYSTYRENE-g-POLY (ETHYLENE OXIDE ) GRAFT COPOLYMER

本文利用透射电子显微镜技术，以两性接校共聚物聚苯乙烯－ｇ－聚氧乙烯为研究对象，研究了接枝共聚物的微相分离形态结构，发现聚苯乙烯－ｇ－聚氧乙烯能形成微相分离结构，微区的形状和尺寸与共聚物的组成和侧链长度有关．文中还讨论了嵌段共聚物和接枝共聚物在形成微相分离结构时的共性和个性．

Although it has ho widely accepted that both block and graft copolymerwill form microphase separation morphology, only detailed morphological knowledge of block copolymers has been reported so far. In choosing an amphiphilicgraft copolymer, namely polystyrene-g-poly(ethylene oxide)(PS-g-PEO) as amodel copolymer, the microphase morphological feature of graft copolymer wasstudied systelnatically for the first bine by means of thensmission electron microscopy.It Was discovered that PS-g-PEO may readily undergo microphase separation and the shape and she of domains depand on the composition andPEO side chain length of the ed copolymer. Both the similarity and difference of the microphase structure between block and graft copolymer were also discussed.