Determination of thermodynamic properties of poly (4-tert-butylstyrene) byinverse gas chromatography

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 343-4 63 K. The specific retention volumes (Vg degrees), the adsorption enthalpy of probes (Delta H-a), the partial molar free energy of sorption (Delta G(1 )(S)), the enthalpy of sorption (Delta H-1(S)), the entropy of sorption (De lta S-1(S)), the weight fraction activity coefficients of solute probes at infinite dilution (Omega(1)(infinity)), and the Flory-Huggins thermodynamic interaction parameters (chi(12)(infinity)) between polymer and solvents ar e given. The partial molar free energy (Delta G(1)(infinity)), the partial molar heat of mixing (Delta H-1(infinity)) at infinite dilution and the sol ubility parameters of the polymer (delta(2)) were calculated. The solubilit y parameter of poly (4-tert-butylstyrene) was determined from either the sl ope or intercept as 7.25 (cal/cm(3))(0.5) and 7.00 (cal/cm(3))(0.5) at 180 degrees C, respectively.