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Graft polymerization of some vinyl monomers onto acrylic rubber. I. Chain transfer and grafting reaction
Author(s) -
Ide Fumio,
Sasaki Isao,
Deguchi Seiji
Publication year - 1971
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1971.070150723
Subject(s) - acrylonitrile , polymer chemistry , grafting , natural rubber , chain transfer , copolymer , polymerization , methyl methacrylate , methyl acrylate , monomer , materials science , ethyl acrylate , styrene , chloroprene , chemistry , radical polymerization , polymer , composite material
The grafting reactions of styrene (St), methyl methacrylate (MMA), and vinyl acetate (VAc) were investigated in the presence of n ‐butyl acrylate–acrylonitrile copolymer. Results showed that the nature of monomer and initiator were the major factors influencing the grafting activity. The grafting efficiency was 0.87 for St, 0.26 for MMA, and 0.18 for VAc under the most favorable conditions. Acrylic rubber reduced the rate of polymerization, and the retarding effect increased in the order St, MMA, VAc. The chain transfer constants for acrylic rubber were evaluated to be 4.8 × 10 −4 for St, 1.27 × 10 −3 for MMA, and 1.45 × 10 −3 for VAc. The rate of polymerization and the grafting efficiency decreased with increasing acrylonitrile content in acrylic rubber, while the chain transfer constant of St for acrylic rubber remained practically unchanged.