Experimental densities and dynamic viscosities of organic carbonate + n-alkane or p-xylene systems at 298.15 K

Abstract

In this work, we report excess molar volumes of organic carbonate+ p-xylene systems and dynamic viscosities of organic carbonate+ n-octane, n-dodecane or p-xylene systems. The excess molar volumes at 298.15 K were calculated from density measurements made by using an Anton-Paar DMA 60/602HP densimeter. All the V m E values were positive for dimethyl carbonate+ p-xylene whereas they were negative for diethyl carbonate+ p-xylene. Viscosities at 298.15 K were also measured with a rolling-ball viscosimeter. In order to determine the dynamic viscosities for organic carbonate+alkane systems, the densities reported in a previous paper were used, whereas for the organic carbonate+ p-xylene those determined in this work were taken. The dynamic viscosity deviations are negative for the organic carbonate+ n-alkane or p-xylene systems in all the composition range. Furthermore, the dynamic viscosities of organic carbonate+ n-alkane were used to test the Group-Contribution Thermodynamic-Viscosity Model (GC-UNIMOD) with two set of UNIFAC–VLE parameters.