A study of the thermodynamical interactions of bisphenol-A polycarbonate with some solvents by gas chromatography

Abstract

Retentin diagrams of polycarbonate for n-nonane, ethyl acetate and n-butyl acetate were obtained using inverse gas chromatography in the temperature range $80-240^circ C$. The specific retention volumes, $V^{circ}_g$ the Flory-Huggins interaction parmeters, $chi^{infty}_{12}$, interaction parameters, $chi^{ast}_{12}$, and effective exchange-energy parameters $bar{X}12$ of the equation-of-state theory of polycarbonate for n-octane, n-nonane, n-decane, ethyl acetate, isopropyl acetate, n-butyl acetate, isobutyl acetate, tert-butyl acetate and isoamyl acetate were obtained in the temperature range $200-240^circ C$. The parameter $delta_2$ was estimated to be $10.7 (cal/cm^3)^{1/2}$ at room temperature using the $chi^{infty}_{12}$ extrapolated to room temperature.