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The present study aimed to synthesize and evaluate copolymerization of starch-acrylamide by gamma irradiation for hydrogel Copolymerization of gelatinized starch and acrylamide (AAm) in aqueous medium using γ-irradiation was carried out. The preparation conditions, such as irradiation dose and AAm concentration, were investigated. The copolymers were characterized by FTIR spectroscopy, thermo-gravimetric analysis (TGA), and scanning electron microscopy (SEM). The results show that by increasing of irradiation dose, the gel fraction increases till the dose of 15 kGy. Above the stating dose, the gel fraction decreases. The Equilibrium Degree of Swelling (EDS) value slightly increases with increasing irradiation dose, and after a dose of 15 kGy is decreasing. The swelling of starch- AAm hydrogels reduced as the gel content increases. The results indicated that the optimum condition for obtaining hydrogels with desirable properties is irradiated at a dose of 15 kGy. The results indicated that SEM revealed that the higher the dose, the lower the copolymer pore size. The starch-AAm copolymers have thermal stability higher than that for starch individually.
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