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Chlorohydrin redox-pair initiated polymerization

Time:2015/11/25 8:19:31

Cerium (IV)-Chlorohydrin redox-pair initiated polymerization of acrylamide in aqueous medium

ABSTRACT The kinetics of acrylamide polymerization has been investigated by employing cericammoniumnitrate-Chlorohydrin redox pair under nitrogen atmosphere at 30 ± 1°C. The rate of monomer disappearance is directly proportional to the concentration of Chlorohydrin (1.0 × 10612 61 10.0 × 10612 mol. dm613) and is inversely proportional to the ceric ion concentration (2.5 × 10613 61 10.0 × 10613 mol. dm613) but shows square dependence to the concentration of monomer (5.0 × 10612 61 25.0 × 10612 mol. dm613). The rate of ceric ion disappearance is directly proportional to the initial concentration of ceric ion and Chlorohydrin but independent of acrylamide concentration. The viscometric average molecular weight (Mv) decreases on increasing the concentration of ceric ion and increases on increasing the concentrations of acrylamide and Chlorohydrin. A tentative mechanism has been proposed.