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


Kaya I. , Mart H.

JOURNAL OF POLYMER ENGINEERING, vol.19, no.3, pp.197-208, 1999 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 19 Issue: 3
  • Publication Date: 1999
  • Doi Number: 10.1515/polyeng-1999-0305
  • Title of Journal : JOURNAL OF POLYMER ENGINEERING
  • Page Numbers: pp.197-208

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 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 (Delta 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 are 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 solubility parameters of the polymer (delta(2)) were calculated. The solubility parameter of poly (4-tert-butylstyrene) was determined from either the slope or intercept as 7.25 (cal/cm(3))(0.5) and 7.00 (cal/cm(3))(0.5) at 180 degrees C, respectively.