Abstract
Polymerization of acrylamide has been performed by γ-ray irradiation at various radiation doses with the help of a Co-60 source, which was used to produce the samples from aqueous solutions of acrylamide monomer in single distilled water having the concentrations of 20, 30 and 40% (w/w). Solubility test, differential scanning calorimetry, and infrared (IR) spectroscopy demonstrate that the properties of the samples prepared by irradiation are quite different from that of a monomer. The degree of polymer conversion is found to depend on doses and concentrations, where maximum conversion reaches at doses of 0.18, 0.16, and 0.10 kGy for 20, 30, and 40% concentrations, respectively. Viscosity and molecular weight (MW) of irradiated samples increase with both the doses and concentrations showing the value of MW≈108, which strongly indicates the polymer formation. The amount of gel content that represents the cross-linked portions in the irradiated samples is found to be negligible, suggesting the formation mainly of polyacrylamide.
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