Gamma radiation induced polymerization of acrylamide in the presence of polyacrylamide in aqueous solution

Gamma radiation - induce polymerization and copolymerization of acrylamide in aqueous solution produce water - soluble polymers which are converted into polymeric gels[1,3] The gel formation or the degree of cross-linking of the produced polymers depend on the concentration of the monomer solutions [2,4] and on factors which affect gelation kinetics such as solvent viscosity and the rate constant for free radical production and polymer addition[5]. Several aspects of such polymerization processes are not fully elucidated particularly phenomena occurring in the neighborhood of the gel - point [6-8]. In this work, polymerization of acrylamide [AM] monomer in the presence of polyacrylamide [PAM] as polymer additive was studied for preparation of a resin. The influence of polymer addition, monomer concentration and absorbed dose on the polymerization of AM and the degree of cross - linking were studied

Floc formation of some water soluble homopolymers

Polyelectrolytes such as polyacrylamide [nonionic polymer], polysodium acrylate [anionic polymer] and poly diallylethylamine-hydrochloride [cationic polymer] were prepared by gamma radiation initiated polymerization of acrylamide, sodium acrylate and diallylethylamine- hydrochloride, respectively. The efficiency of flocculation of these polyelectrolytes was tested on copper sulfate solution at different pH and polymer concentrations. Results were discussed and suggestions for possible floc formation are presented