Abstract
Abstract Graft copolymers of methyl acrylate onto starch were prepared in aqueous solution at 29°C using ceric ion and the batch and modified batch polymerization (with incremental addition of monomer and initiator) processes. It was found that the conversion of monomer to polymer, the graft levels, the efficiency and frequency of grafting were markedly higher for the modified batch process. The effect of thiourea on the grafting characteristics of ceric ion initiated copolymerization of methyl acrylate was also examined. The results show that at comparable ceric ion concentrations, the molecular weight and the frequency of grafting methyl acrylate were higher in the presence of thiourea.
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