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Indexed by:期刊论文
Date of Publication:2015-04-01
Journal:MACROMOLECULAR RAPID COMMUNICATIONS
Included Journals:SCIE、EI、PubMed、Scopus
Volume:36
Issue:8
Page Number:726-732
ISSN No.:1022-1336
Key Words:controlled branching; hydrosilylation; living anionic polymerization; bottlebrush polymers
Abstract: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.
Pre One:Preparation of functionalized precursor of SiC ceramic via hydrosilylation polymerization of 1,1-diphenylethylene derivatives
Next One:Construction of Topological Macromolecular Side Chains Packing Model: Study Unique Relationship and Differences in LC-Microstructures and Properties of Two Analogous Architectures with Well-Designed Side Attachment Density
