Dynamic properties of the adsorption films of the copolymer of N-isopropylacrylamide and sodium 2-acrylamide-2-methyl-1-propane sulfonate

摘要

The dynamic surface elasticity of the aqueous solutions of the copolymer of sodium 2-acrylamide-2-methyl-1-propane sulfonate and N-isopropylacrylamide is measured by the oscillating barrier method as a function of surface lifetime and copolymer concentration. The results obtained are in qualitative agreement with the theory accounting for Coulombic interactions between segments, yet, at the same time, strongly differ from those obtained for sodium poly(styrene sulfonate), thereby confirming earlier conclusion on the effect of non-Coulombic interactions on the surface properties of this polymer solutions.