THERMAL POLYMERIZATION OF ACRYLAMIDE DURING THE FORMATION OF THE STRUCTURES OF ACRYLAMIDE COMPLEXES WITH METAL NITRATES

The effects of the composition of Mn-II, Co-II or Ni-II nitrate hydrate - acrylamide (AAM) mixtures and of the duration df their aging at ambient temperature on the structurization of acrylamide complexes and on the character of their thermal polymerization have been studied by scanning and isothermic differential calorimetry. Structurization is a rather prolonged step in the synthesis of acrylamide complexes. The peculiarities and rate of this step are determined by the composition of the mixture and by the nature of the complex-forming compound; it yields several structural modifications of the AAM complexes. The thermal polymerization of those structural forms of acrylamide complexes that polymerize at low temperatures may be formally described as polymerization in an acrylamide-nitrate-water mixture. The effective activation energy of the polymerization of acrylamide mixed with Mn-II nitrate hydrate is 45 kJ mol(-1).