Abstract
A study was made of the effect of tris-(2-carbamoylethyl) amine (TCA) formed during polymerization of acrylamide in alkaline solutions on the decomposition of a potassium persulphate (PPS) initiator. According to the reaction system proposed, secondary amine, enamine and aldehyde are the main products of interaction of TCA and PPS; potassium bisulphate is also a product which combines the unreacted TCA into TCA sulphate, inactive to PPS. The formation in the polymerization system of TCA explains the reduction of MW of polyacrylamide as a consequence of a marked increase in the rate of decomposition of persulphate initiators by the action of TCA. The use of the PPS-TCA initiating system enables polymerization to be carried out at room temperature and high-molecular weight polyacrylamide to be obtained.
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