Abstract
Low angle quasi-elastic light scattering has been used to measure translational diffusion coefficients of sodium salts of partly hydrolyzed polyacrylamide samples in the presence of added NaCl.Experiments have been performed both in the dilute concentration range and above the critical concentration for overlapping of polymeric chains.The results reported in the semi-dilute domain are in agreement with the scaling laws predicting the concentration dependence of diffusion coefficients of flexible coils in good solvent condition.
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