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论文类型：期刊论文
发表时间：2015-04-01
发表刊物：MACROMOLECULAR RAPID COMMUNICATIONS
收录刊物：SCIE、EI、PubMed、Scopus
卷号：36
期号：8
页面范围：726-732
ISSN号：1022-1336
关键字：controlled branching; hydrosilylation; living anionic polymerization; bottlebrush polymers
摘要：By combining living anionic polymerization and hydrosilylation, densely grafted bottlebrush polymers with controlled spacing of branch points are prepared. Dimethyl(4-vinylphenyl) silane and dimethyl(4-(1-phenylvinyl)phenyl)silane are anionically (co)polymerized to synthesize uniform, alternating, and gradient in-chain silyl-hydride (Si-H) functionalized backbones. The spacing of branch points is controlled effectively by regulating the distribution of Si-H groups along the backbones. Three backbones with a similar number of Si-H groups but variable distributions are used to synthesize corresponding bottlebrush polymers via hydrosilylation between the backbones and chain-end vinyl functionalized polystyrene. The uniformly grafted bottlebrush exhibits the highest hydrodynamic radius (R-h) of 5.6 nm and the lowest T-g of 79 degrees C which may be attributed to its compact grafted structure. This methodology exhibits high efficiency and convenience for the construction of bottlebrushes with controlled distribution of brushes.