Abstract
Abstract The aqueous polymerization of acrylamide initiated by the glycolic acid/Ce4+ redox system was studied in sulfuric acid medium at 35 ± 0.2°C under a nitrogen atmosphere. The initiation was carried out by the free radical generated in the decomposition of the complex formed between the oxidant and the reductant. The monomer disappearance was found to be proportional to [GA]0,89[Ce4+]0.57[M]1.0, and the rate of ceric ion disappearance was found to be directly proportional to [Ce4+] and [GA] but independent of [M]. The activation energy of the system was found to be 7.21 kcal/deg/mol. The molecular weight of polyacrylamide increased with increasing [monomer] and decreased with increasing [catalyst]. The effect of pH was also studied in the pH range 2.22 to 1.44.
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