Abstract
Radical co-polymerization of acrylamide and sodium methacrylate in the presence of azobis(isobutyronitrile) (AIBN) as a radical initiator was investigated in bulk. The co-polymerization reaction was studied by differential scanning calorimetry (DSC) at isothermal and also dynamic modes. Thermal transitions relating to melting of acrylamide, co-polymerization and post-co-polymerization reactions were used to follow the progress of reaction. It was observed that the conversion did not reach 100% under isothermal conditions and a heating process up to higher temperatures was needed to continue the polymerization reaction (dynamic mode). Several conditions, such as variation of co-monomer ratios and initiator amounts, were tested and the results were analyzed. However, according to the obtained data, mechanistic studies were carried out due to the surface immobilization theory and radical occlusion theory.
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