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Studies on the Atom Transfer Radical Branching Copolymerization of Styrene and Acrylonitrile with Divinyl Benzene as the Branching Agent
Author(s) -
Huang Wenyan,
Zheng Yiliang,
Jiang Bibiao,
Zhang Dongliang,
Chen Jianhai,
Yang Yang,
Liu Chunlin,
Zhai Guangqun,
Kong Lizhi,
Gong Fanghong
Publication year - 2010
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201000224
Subject(s) - branching (polymer chemistry) , copolymer , polymer chemistry , acrylonitrile , monomer , chemistry , chain transfer , styrene , atom transfer radical polymerization , coupling reaction , benzene , polymerization , radical polymerization , photochemistry , polymer , organic chemistry , catalysis
The branching copolymerization of styrene and acrylonitrile with divinyl benzene as the branching agent was carried out using atom transfer radical polymerization. Nuclear magnetic resonance and triple detection size exclusion chromatography were used to analyze the reaction. The results suggest that the coupling reaction mainly takes place between the primary chains, forming slightly branched chains in the early stages. The coupling reaction between the branched chains becomes significant at the middle stages, forming highly branched chains. The reaction system consists of primary chains, slightly branched chains containing two primary chains and highly branched chains comprised of more than three primary chains. The weight fraction of the branched chains increases expectedly with monomer conversion.