Abstract
This work reports thermophysical properties measurements of binary mixtures of N,N-dimethylacetamide with 2-propanol and 2-butanol. Density, ρ, speed of sound, u, refractive index, nD, and kinematic viscosity, ν, were measured over the whole composition range at the temperatures (283.15, 298.15 and 313.15) K and at atmospheric pressure p=0.1MPa. Experimental data were used to calculate the following properties: excess molar volume, VE, excess isentropic compressibility, κSE,refractive index deviation, ΔnD, and viscosity deviation, Δη. These properties were correlated with the Redlich-Kister equation. Excess molar volumes were positive for both mixtures. Refractive index deviations were positive for N,N-dimethylacetamide+2-propanol and negative for N,N-dimethylacetamide+2-butanol. Excess isentropic compressibilities and viscosity deviations were negative for the two systems. Finally, the results obtained were interpreted based on both structural and energetic effects.
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