Determination of Thermodynamic Properties of Poly(4-tert-Butylstyrene) by Inverse Gas Chromatography

Abstract

Abstract Some thermodynamic quantities were obtained for the interactions of poly (4-tert-butylstyrene) with alcohols, ketones, acetates, aromatics and alkanes by the inverse gas chromatography method in the temperature range of 343-463 K. The specific retention volumes (Vg°), the adsorption enthalpy of probes (ΔH2), the partial molar free energy of sorption (ΔG1S), the enthalpy of sorption (ΔH1S), the entropy of sorption (ΔS1S), the weight fraction activity coefficients of solute probes at infinite dilution (Ω1∞), and the Flory- Huggins thermodynamic interaction parameters (χ∞12) between polymer and solvents are given. The partial molar free energy (ΔG1∞, the partial molar heat of mixing (ΔH1∞ at infinite dilution and the solubility parameters of the polymer (δ2) were calculated. The solubility parameter of poly (4-tert-butyl- styrene) was determined from either the slope or intercept as 7.25 (cal/cm3)0,5 and 7.00 (cal/cm3)0,5 at 180°C, respectively.