Cationic resins prepared by radiation-induced graft copolymerization

Poly(acrylamide-acrylic acid) resin P(PAM-AA) was prepared by gamma radiati on-initiated grafting copolymerization of acrylic acid (AA) on polyacrylami de (PAM) by addition of Mohr's salt as an inhibitor for homopolymerization. The polymerization was studied at different absorbed doses, polymor/monome r ratios and the monomer concentrations. The grafting percentage increases by increasing the dose and the monomer concentration and decreases by incre asing polymer;monomer ratio. There is no significant change in the swelling degree of the obtained resin. It was found that the capacity of the resins towards Cu2+ increases with increasing the monomer concentration and decre ases by increasing the polymer/monomer ratio. The capacity of the resin was found to be constant at all doses. (C) 1999 Elsevier Science Ltd. All righ ts reserved.