A queous Polymerization of A crylonitrile and Methyl Methacrylate by Cerium(IV)-Glycine Redox System Catalysed by Bromide Ion:A Kinetic Study

摘要

Polymerization of acrylonitrile and methyl methacrylate monomers (M),initiated by a cerium(IV)-glycine redox system catalysed by bromide ion was investically,over a temperature range of 35-50deg C in aqueous medium under inert atmosphere.The incorporation of bromide ion, with cerium (IV)- glycine redox system and rate of polymerization (R_p) has been studied at various concentration so monomers and initiator. The polymerization exhibited a strong dependence on the concentration of bromide ion. The rate of polymerization, R_p infinity [M][Ce(IV)] [AH]~(1/2). The influence of organic solvents iand temperature on the rate of polymerization has also been investigated and energy of activation was calculated.On the basis of experimental results,a suitable kinetic scheme has been proposed and a rate expression has been derived.