Grafting of acrylonitrile outo rice starch-super absorbent polymer

Grafting of acrylonitrile [AN] onto rice starch was accomplished using ceric ammonium nitrate [CAN] as catalyst. The effect of monomer, backbone, catalyst concentration on rate of conversion of monomer [Rp], rate of graft copolymerization [Rg], grafting effeciency [GE], grafting ratio [GR] is discussed. The absorption of water obtained from different sources by saponified product of graft copolymer was determined. The increment in absorbancy [g H2O g-1] is due to the formation of carboxyl anions [- COO-] in the polymer network which develops strong electrostatic forces. The effect of aqueous sodium chloride on saponified product is also discussed