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The monomer, acrylonitrile, was graft copolymerized onto Carboxymethylcellulose (CMC) using γ-rays as initiator. The reactions were carried out in a homogenous aqueous medium. After removal of the homopolymer, the graft copolymer was characterized by FTIR spectroscopy. the structure of pure pectin and grafted with monomer was also characterized by TGA analysis. The thermal properties of pure pectin and grafted with monomer were evaluated with a simultaneous thermal analysis system. The results showed that the thermal stability of grafted polyacrylamide samples was remarkably improved.A plausible mechanism of grafting has also been suggested. The effect of various factors affecting on grafting, i.e. dose of δ-rays and concentration of the monomer and polysaccharide as well as the reaction temperature were studied by conventional methods to achieve the optimum grafting parameters.

Radiation-Induced Graft Copolymerization of Acrylamide onto Carboxymethylcellulose and Modification of its Chemical Structure