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Kinetic studies of aqueous polymerization of acrylic acid initiated using potassium bromate/sodium metabisulphite redox pair
Author(s) -
Liu Zuifang,
Brooks Brian W.
Publication year - 1998
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/(sici)1097-0126(199802)45:2<217::aid-pi927>3.0.co;2-q
Subject(s) - potassium bromate , polymerization , chemistry , acrylic acid , polymer chemistry , aqueous solution , radical polymerization , sodium polyacrylate , chain transfer , potassium , sodium , bromate , inorganic chemistry , organic chemistry , monomer , catalysis , polymer , raw material , bromide
Abstract Aqueous polymerization of acrylic acid was conducted using potassium bromate/sodium metabisulphite redox initiators under isothermal conditions. The initial polymerization rates were determined with variation in temperature and in the initial concentrations of acrylic acid, potassium bromate and sodium metabisulphite. The effect of pH on polymerization was also investigated. An overall activation energy of 28·62kJmol ‐1 was obtained over the temperature range 13–43°C. The polymerization is initiated by free radicals and terminated by a combination of monomolecular and bimolecular modes. The cage effect and chain transfer to bisulphite anion are probably both significant. © 1998 SCI.