Synthesis and Properties of Carboxymethyl Cellulose Graft Sodium Acrylate Copolymer

Based on mechanism of free radical polymerization and graft copolymerization,under the effection of ammonium persulfate as the initiator ,a super water-absorbent resin is prepared from carboxymethyl cellulose (CMC) grafting sodium acrylate. Through experiments we discuss the influences on the grafting copolymer properties by the amount of initiator and the ratio of materials. Judging from the experiments of water-absorbing ability, absorption ratio and water retention,we know that the copolymer of CMC grafting sodium acrylate is a super absorbent of good quality, especially its anti-salt property. It can absorb water 1000g/g, and 0.9% salt water 140~160g/g.It has good water-keeping property.