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The relationship between the reduced viscosity of the system [poly(sodium acrylate-co-acrylamide)]/[poly-2-(N,N-diethyl-N-methylamino)ethyl acrylate] and pH at µ = 0.05 (curve 1), 0.075 (curve 2), 0.25 (curve 3), and 0.5 (curve 4). (Reprinted from [174]).
