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 hydrat e - acrylamide (AAM) mixtures and of the duration df their aging at am bient temperature on the structurization of acrylamide complexes and o n the character of their thermal polymerization have been studied by s canning and isothermic differential calorimetry. Structurization is a rather prolonged step in the synthesis of acrylamide complexes. The pe culiarities and rate of this step are determined by the composition of the mixture and by the nature of the complex-forming compound; it yie lds 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 polymeriz ation in an acrylamide-nitrate-water mixture. The effective activation energy of the polymerization of acrylamide mixed with Mn-II nitrate h ydrate is 45 kJ mol(-1).