Determination of thermodynamic interactions of the PVC-PMMA blend system by inverse gas chromatography

Kaya İ.

POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING, vol.38, no.2, pp.385-396, 1999 (SCI-Expanded) identifier identifier


In this study, the sorption enthalpy (Delta H-1(s)), sorption free energy (Delta G(1)(s)), sorption entropy (Delta S-1(s)), enthalpy, and free energy at infinite dilution (Delta H-1(infinity) and Delta G(1)(infinity)) values were calculated for selected probes such as alcohols, ketones, acetates, cyclic ethers, aromatics, and alkanes in the temperature range 403-433 K for poly(methyl methacrylate) (PMMA), poly(vinyl chloride) (PVC) homopolymers, and the PVC-PMMA blend system. The values of the Flory-Huggins interaction parameters chi((23))' have been calculated in this temperature range and show the importance of specific interactions between the polymers and the solvents. The values of the polymer-polymer interaction parameters chi(2)'(3)(for the temperature range 403-433 K) were found to change from +3.57 to +1.16 for alcohols, from +2.99 to +0.52 for ketones, from +1.60 to -0.48 for acetates, from +0.96 to -1.46 for cyclic ethers, from +2.66 to +0.12 for aromatics, and from +8.73 to +1.06 for alkanes.