文献类型：期刊文献

英文题名：Morphology of poly(styrene-block-dimethylsiloxane) copolymer films

作者：Wu, Ningjing[1]; Zheng, Anna[2]; Huang, Yongmin[3]; Liu, Honglai[3]

机构：[1] Key Laboratory for Rubber and Plastics Engineering, Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China; [2] Key Laboratory for Ultrafine Materials, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China; [3] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

年份：2007

卷号：104

期号：2

起止页码：1010

外文期刊名：Journal of Applied Polymer Science

收录：EI(收录号：20071410522264)

语种：英文

外文关键词：Atomic force microscopy - Copolymers - Glass transition - Polydimethylsiloxane - Polystyrenes - Thin films - Transmission electron microscopy

摘要：The morphologies of poly(styrene-block-dimethylsiloxane) (PS-b-PDMS) copolymer thin films were analyzed via atomic force microscopy and transition electron microscopy (TEM). The asymmetric copolymer thin films spin-cast from toluene onto mica presented meshlike structures, which were different from the spherical structures from TEM measurements. The annealing temperature affected the surface morphology of the PS-b-PDMS copolymer thin films; the polydimethylsiloxane (PDMS) phases at the surface were increased when the annealing temperature was higher than the PDMS glass-transition temperature. The morphologies of the PS-b-PDMS copolymer thin films were different from solvent to solvent; for thin films spin-cast from toluene, the polystyrene (PS) phase appeared as pits in the PDMS matrix, whereas the thin films spin-cast from cyclohexane solutions exhibited an islandlike structure and small, separated PS phases as protrusions over the macroscopically flat surface. The microphase structure of the PS-b-PDMS copolymer thin films was also strongly influenced by the different substrates; for an asymmetric block copolymer thin film, the PDMS and PS phases on a silicon substrate presented a lamellar structure parallel to the surface at intervals. ? 2007 Wiley Periodicals, Inc.