Isıl kararlılıklı polifenil kinoksalin'in termodinamik özelliklerinin gaz kromatografisinde incelenmesi

Abstract

Gibbs energies of adsorption (Gads) of an aromatic heterocyclic thermally stable polymer, polyphenyl quinoxaline (PQF), having a high glass transition temperature, have been obtained at l51.16°C, 176.35°C and 200.85°C with 38 solvents by gas-solid chromatography. Gads has been expressed at the three temperatures in terms of the polarizability and dipole moment of solvent and solvent-polymer specific interaction parameter. A solubility criterion for PQF has been stated in terms of solubility parameters of solvent and polymer, Flory-Huggins parameter and specific interaction parameter of polymer-solvent pair. A computer program has been developed to evaluate gas chromatographic data and to estimate pure solvent properties as second virial coefficient, critical temperature, pressure and volume, saturated vapor pressure, heat of vaporization, liquid molar volume and solubility parameter.