COPOLYMERIZATION OF ACRYLAMIDE WITH SODIUM-2-ACRYLAMIDO-2-METHYLPROPANE SULFONATE IN INVERSE EMULSION

The kinetics of the radical copolymerization of acrylamide (AA) with s odium-2-acrylamido-2-methylpropane sulfonate (Na-AMS) in inverse water -heptane (1:4) emulsions in the presence of emulsifier sorbitan C and the persulfate-bisulfite redox system at 50 degrees C have been studie d. The extreme form of the dependence of initial rates of copolymeriza tion and of intrinsic viscosity of the copolymers formed on the concen tration of Na-AMS in the initial monomers mixture was found. The copol ymer composition changes with the concentration of Na-AMS. The analysi s of composition distribution curves for copolymers indicated that the experimental curves are characterized by a greater polydispersion tha n the corresponding theoretical curves.