In continuation of our investigation of the extension of the local composition models for the representation of the thermodynamic properties of polymer solutions, in this study, combination of two successful models NRF and Wilson named NRF-Wilson model is extended for the representation of the excess Gibbs energy of the polymer solutions. The utility of the obtained equations is demonstrated with the successful representation of the vapor-liquid equilibria, density and viscosity of several polymer solutions. The results show that, the model is valid for the whole range of polymer concentration, from dilute solution up to saturation. The results are compared with those obtained from the polymer-NRTL and polymer-Wilson models. The model presented in this work produces better results.
