The polymerization of methyl acrylate and styrene was carried out under 60Co γ-irradiation in the presence of dithiobenzoic acid (DTBA) and the kinetics of the polymerization of methyl acrylate was studied. The polymerizations are of a controlled free radical character. The molecular weight of the polymers increases with increasing monomer conversion, and the polydispersities of polystyrene and poly(methyl acrylate) are less than 1.4.
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Bai et al. (2001) studied this question.