2007•Journal of Functional PolymersRequires access
Graft-Copolymerization of Acrylamide onto Cationic Starch and Chitosan
Zhangfa Tong
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Abstract
A new graft-copolymer was prepared through the graft-copolymerization of acrylamide onto cationic starch and chitosan with ceric ammonium nitrate as an initiator.The effects of the(reaction) temperature and time,concentration of initiator,content of monomer and chitosan on graft-copolymerization were examined.The polymerization rate and graft efficiency of acrylamide are above 88% and 92% respectively as the conditions are the follow: the concentration of AGU is 0.20 mol/L,the mass ratio of chitosan to cationic starch is 1/6,the concentration of acrylamide is 1.0 mol/L,the concentration of initiator is 5 mmol/L,temperature is 60 ℃,time is 3 h.As the mass ratio of chitosan to cationic starch increases,the polymerization rate increases.Graft efficiency decreases all the time with the content of chitosan increasing,which shows the homopolymerization possibility of acrylamide increases in the present of chitosan.