Abstract
The graft copolymerization of methyl methacrylate onto chitosan was carried out, and the following results were obtained.
1) In the case of the non-catalytic photo-induced method, an induction period was observed and the polymerization proceeded mainly by the photolysis of amino groups.
2) In case of the photosensitized method, the grafting activity of azobisisobutylonitrile was higher than that of ph2 CO.
3) In the initiator method, the grafting activity of ammonium persulfate was higher than that of H2O2.
The degree of grafting and the apparent number of grafted chains generally decreased in the following order; the initiator method>the photo-induced method without catalyst>the photoinduced method with photosensitizer.
As for the photo-induced graft copolymerization of binary monomers (AN-MMA and AN-St) in the presence of chirosan, the monomer reactivity ratios of the graft and the ungrafted copolymer almost coincided with the values of the literature obtained in homogeneous system.
