Prediction of VLE of polymer solutions by the GFD equation of state

The generalized-Flory dimer (GFD) equation of state (EOS) is combined with the UNIFAC-FV group contribution GE model to yield predictive vapor–liquid equilibrium calculations of polymer solutions. The equilibrium pressures, solvent solubility and activity of various binary systems are calculated. The GFD/GE method predicts good results in comparison to those from other optimally fitted models.