A graft copolymer of polyacrylonitrile with starch was obtained by radical polymerization of acrylonitrile in the presence of ceric salt and amylose, accompanied by a considerable amount of homopolymer of acrylonitrile. The rate of polymerization was faster in dimethyl sulfoxide than in water. The following empirical rate equations were presented. equation image where A, B and C are constants and [S], [M] and [TCe 4+ ] are the concentration of starch, acrylonitrile and total ceric compounds respectively. The differences between the two equations were discussed.
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Kimura et al. (1960) studied this question.
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