Macrolattice Structure of a Block Copolymer in a Selective Solvent

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• 作者：S. H. Chen and A. C. Su
• 关键词：Macrolattice ; Block copolymer ; Selective solvent ; Transmission electron microscopy
• 刊名：Journal of Polymer Research
• 出版年：1998
• 出版时间：1998
• 年：1998
• 卷：5
• 期：1
• 页码：9-14
• 全文大小：2.97 MB

文摘

Macrolattice structure in the ordered phase of a poly(styrene-b-butadiene-b-styrene) (SBS, with the bulk morphology of spherical polystyrene microdomains in the polybutadiene matrix) dissolved in a selective solvent (dodecyl methacrylate, C₁₂MA, or a 75/25 w/w mixture of C₁₂MA and butylene diacrylate, BDA) which mixes preferentially with the polybutadiene matrix was examined by means of transmission electron microscopy. The use of C₁₂MA/BDA mixture as the selective solvent provided the opportunity of freezing the macrolattice structure upon UV-initiated polymerization of the acrylic monomers when the SBS content is above ca. 60 wt % . Results indicated clearly a body-centered cubic structure, in contrast to the simple cubic packing previously proposed.