Study of aqueous polyacrylamide solutions with concentrations

The detailed systematic study of aqueous polyacrylamide solutions at different concentrations and different molar concentrations of NaCl solutions along with the dependency at scattering angles 175^o and 90^o has been performed rigorously using the Dynamic Light Scattering method. Aqueous polymer solutions of different concentrations of polymer as well as at different molar concentrations of NaCl solutions were prepared for the study. Analyses of the correlation functions show the presence of three concentration regions consisting each with the presence of fast and slow modes. Out of three, the one (unentangled semidilute) concentration regime shows the unique morphology of polymer solutions irrespective of the change in polymer concentrations and with the change in NaCl concentrations. Furthermore, the angular dependency results show the presence of amount of heterogeneity of polymer chains in the solutions which quantified from the overall change of stretching parameter of slow mode β (Dilute and entangled region ~ 20%, Unentangled region ~ 7%).