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ABSTRACT:The polymerization of acrylamide, initiated by a cerium (IV) [Ce(IV)] ammonium nitrate-methionine redox initiator system, was carried out in an aqueous solution at different reaction conditions. The dependence of molecular weight and polymerization yield on the concentration of Ce(IV), polymerization time, and temperature was determined. The molecular weight distributions (MWD) of the resulting polymers were examined using the HPLC method. Based on the HPLC results, optimum reaction conditions were determined that provided an opportunity to obtain a polymer that had a narrow MWD.

The polymerization of acrylamide, initiated by a cerium (IV) [Ce(IV)] ammonium nitrate-methionine redox initiator system, was carried out in an aqueous solution at different reaction conditions. The dependence of molecular weight and polymerization yield on the concentration of Ce(IV), polymerization time, and temperature was determined. The molecular weight distributions (MWD) of the resulting polymers were examined using the HPLC method. Based on the HPLC results, optimum reaction conditions were determined that provided an opportunity to obtain a polymer that had a narrow MWD.

Lethal or harmful effects of X-rays and gamma rays are known to be reduced by prior administration of certain ''radioprotector'' chemicals. In this work, complex formation of polyacrylamide with bovine serum albumin (as a model protein) in the presence of divalent copper ions (Cu 2/ ) was investigated with high-performance liquid chromatography (HPLC) before evaluating its possible use as a radioprotector. HPLC results determined the most suitable metal concentration and protein/polymer ratio for maximum complex formation between polymer and protein molecules.

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