Abstract
It was found that copper(II) amino acid chelates initiate polymerization of acrylamide thermally, in the presence of CCl4. Amino acids used were glutamic acid, serine and valine. Analysis of the results shows that at lower concentrations of the initiator the rate of polymerization is proportional to [initiator]1/2 and [monomer]3/2. At higher concentrations of the initiator polymerization was found to be inhibited. Kinetics indicate a radical mechanism of polymerization. The initiating radicals seem to be · CCl3 radicals, that are formed between CCl4 and “a loose adduct” resulting from the complex and the monomer. The effect of temperature was also studied. A possible reaction scheme is proposed to explain various reactions occurring in polymerization. Thermal initiation efficiencies of these chelates were found to be much greater than their photochemical counterpart in the absence of CCl4.
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