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The cooperative binding behavior of progressively hydrolyzed polyacrylamide with nonionic surfactant TritonX-100 (Tx-100) at different concentrations and temperatures has been studied viscometrically. The effect of polymer concentration and temperature on association characteristics of surfactant molecules has been investigated tensiometrically. Rationalization of the results (intrinsic viscosity, polymer saturation point, critical aggregation concentration, etc.) in terms of surfactant and polymer concentration as well as temperature has been attempted.