Activity coefficients of hydrocarbons in polycarbonate by gas chromatography

Polycarbonates (PCs) are polyesters used for high-tech applications. For th ese applications many properties are needed. Gas chromatography can provide useful information about the thermodynamic properties of polymer systems f or the determination of the parameters characterising polymer-solvent inter actions. In this work, bisphenol A PC was studied by GLC: weight activity c oefficients at infinite dilution and the Flory-Huggins parameter chi for pa raffinic, cycloparaffinic and aromatic solvents have been determined. Two t hermodynamic models, universal functional group activity coefficients (UNIF AC)-FV and GC-Flory equation of state (EOS), were applied to correlate the experimental data. (C) 2000 Elsevier Science B.V. All rights reserved.