The polymerization of methyl methacrylate in the presence of ceric ion and pinacol in acetic acid solution has been investigated. Acetone formed in the reaction products has been determined and the mechanism and kinetics of the polymerization have been studied. It has been confirmed that the primary radical formed from pinacol reacts with not only the monomer to produce a monomer radical and initiate the polymerization but also with ceric ion. Under the present experimental conditions, the reaction of the primary radical with ceric ion is about 127 times as fast as that with monomer. The monomer radical produced reacts with another monomer to propagate polymerization. The polymerization is terminated by reaction of the polymer radical with ceric ion. The rate of polymerization was proportional to [pinacol], [monomer]2 and reciprocal to [CeIV].
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Narita et al. (1969) studied this question.
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