Volumetric Properties of Glycerol Formal plus Propylene Glycol Mixtures at Several Temperatures and Correlation with the Jouyban-Acree Model

Abstract

Molar volumes, excess molar volumes, and partial molar volumes were investigated for glycerol formal + propylene glycol mixtures from density measurements at temperatures from (278.15 to 313.15) K. Mixture compositions were varied in 0.05 in mass fraction of both components. Excess molar volumes were fitted to the Redlich-Kister equation and compared with literature values for other systems. The system exhibits positive excess volumes probably due to increased non-specific interactions. The effect of temperature on the different volumetric properties studied was also analyzed. In addition, the volumetric thermal expansion coefficients were calculated. The Jouyban-Acree model was used for density and molar volume correlations of the mixtures at the different experimental temperatures. The mean relative deviations between experimental and calculated data are 0.04 +/- 0.03 and 0.04 +/- 0.05, respectively, for the density and molar volumes, using the minimum number of data points, the Jouyban-Acree model can predict density and molar volume with acceptable accuracies (0.06 +/- 0.04 and 0.08 +/- 0.05, respectively).