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Abstract
Graft copolymerization of methyl methacrylate on potato starch was carried out in methanol-water medium under visible light using potassium pervanadate as initiator. The effects of different methanol-water ratios (v/v), initiator concentrations, monomer concentrations, starch contents, and times of polymerization were studied. Percent grafting, % total conversion, and grafting efficiency (%) under different conditions were evaluated and compared. High grafting efficiency (∼90%), high % total conversion (∼85%), and high % grafting (∼95%) were readily obtained. The reaction mechanism for graft copolymer formation is discussed.
