Optimal preparation conditions and characterizations of graft copolymerization for VAc onto potato starch

This paper mainly studies the influencing factors for the grafting copolymerization of the vinyl acetate onto potato starch.The orthogonal experiment indicates that the optimum reaction condition :initiator density is 18 mmol/L,reaction temperature is 60℃,reaction time is 3.5 h,monomer allocated proportion is 2.5∶1,starch density is 5% and the optimal grating ratio is 99.85%.Finally,the existence of the grafting copolymerization of the vinyl acetate onto potato starch is confirmed by the structure analysis of the starch grafting copolymerization using SEM,XRD and FTIR.