Self-assembly of POSS-containing block copolymers: Fixing the hierarchical structure in networks

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• 作者：Libor Mat臎jka ; Miroslav Janata ; Josef Ple拧til ; Alex ; er Zhigunov ; Miroslav 艩louf
• 关键词：Block copolymers ; Self-assembly ; POSS
• 刊名：Polymer
• 出版年：14 January, 2014
• 年：2014
• 卷：55
• 期：1
• 页码：126-136
• 全文大小：2020 K

文摘

A series of P(MMA-m>com>-GMA)-m>bm>-PMAPOSS block copolymers (BCPs) were synthesized by ATRP. The BCPs contain POSS (polyhedral oligomeric silsesquioxane) as a pendant unit on a particular polymer block chain. In selective solvents, the BCPs self-assemble to form ordered micellar-like structures. Spherical, cylindrical or vesicle-like morphologies were produced by tuning the BCP and mixed solvent compositions. Crosslinking of the BCP by the reaction of the glycidyl groups in the P(MMA-m>com>-GMA) block of the micelle shell (GMA聽=聽glycidyl methacrylate) with a diamine results in a long-range structure ordering. The hexagonally packed cylindrical arrangement of the BCP networks was revealed by SAXS and TEM. The hierarchical, ordered structure of the POSS-containing hybrids was fixed by crosslinking. In addition, transient physical gels were prepared from triblock copolymers with outer MAPOSS blocks, and their rheological behavior was investigated.