RADIATION GRAFT-COPOLYMERIZATION OF 2-HYDROXYETHYL-METHACRYLATE ONTO POLY(GAMMA-METHYL-L-GLUTAMATE) MEMBRANE - STUDY OF REGULARITY OF GRAFT-COPOLYMERIZATION IN AQUEOUS-SOLUTION

The regularities of radiation-induced graft copolymerization of HEMA o nto PMLG membranes were investigated in aqueous system. The experiment al results showed that the change of the percentage of grafting in a m ixture solvent of water and ethanol appears S-shaped curve. It was fou nd also that the radiation-induced graft copolymerization is competing with propagation, sisson, depolymerization, and crosslinking of the p olymer. The influence of dose rate on rate of grafting and percentage of grafting showed that diffusion of HEMA controll the graft copolymer ization. The rate of grafting is dependent not only on grafting temper ature but also on HEMA concentration. (C) 1997 Elsevier Science Ltd.