New Synthesis Technology of Corn Starch-g-Methyl Methacrylate Using Half Dry Process

Corn starch-g-methyl methacrylate(MMA) copolymer was synthesized using ceric ammonium nitrate(CAN) as initiator by solid-phase half dry process. The effects of water content, acidity of reaction system, reaction time, reaction temperature, contents of the MMA monomer and the initiator CAN on the graft copolymerization were investigated. It is showed that graft copolymer with higher grafting ratio, grafting efficiency and monomer conversion was obtained when the mass fraction of water in reaction system is about 35%, CAN mass is 1.5%～3% of corn starch mass, the reaction temperature is 40～50℃ and the reaction time is about 0.5h.