Graft Copolymerization of Vinyl Acetate and Ccarboxymethyl Chitin

The graft copolymerization of vinyl acetate onto carboxymethyl chitin was investigated with using ammonium persulfate as an initiator.The polymer product was characterized by IR.The effects of reaction temperature,time,and amount of initiator,monomer and solvent on the grafting rate and efficiency were studied,and the optimum conditions had been found.And they are shown as following:carboxymethyl chitin is 0.4g,water is 50.0mL,vinyl acetate is 1.5g,ammonium persulfate is 60.0mg,reacts at 70℃ for 3.0h,the grafting efficiency is 65.1%.The graft copolymerization of carboxymethyl chitin can extend its application.