WATER-SOLUBLE POLYMERS .33. AMPHOLYTIC TERPOLYMERS OF SODIUM 2-ACRYLAMIDO-2-METHYLPROPANESULFONATE WITH 2-ACRYLAMIDO-2-METHYLPROPANEDIMETHYLAMMONIUM CHLORIDE AND ACRYLAMIDE - SYNTHESIS AND AQUEOUS-SOLUTION BEHAVIOR

Synthesis and viscometric studies of a series of moderate-to-low charge-density terpolymers of acrylamide (AM) with sodium 2-acrylamido-2-methylpropanesulphonate (NaAMPS) and 2-acrylamido-2-methyl-propanedimethylammonium chloride (AMPDAC) have been conducted. Plots of apparent viscosity versus polymer concentration revealed critical overlap concentrations (C*) in the range 0.10-0.14 g dl-1. The dependence of the reduced viscosity of the terpolymers on temperature was minimal, with only a slight decrease in viscosity observed with increasing temperature. Reduced viscosity was shown to be a function of polymer composition, charge distribution and molecular weight of the terpolymers. The low-to-moderate charge-density terpolymers of NaAMPS with AMPDAC displayed viscosities over 100% greater than the high charge-density copolymers. The superior viscometric characteristics of the terpolymers became more evident as the polymer concentration approaches C*. © 1990.