Volumetric and Viscous Properties for Binary Mixtures of N-Methylpiperazine with Ethyl Acetate or Butyl Acetate from 298.15 K to 313.15 K

Density and viscosity data for binary mixtures of N-methylpiperazine + ethyl acetate and N-methylpiperazine+butyl acetate were measured over the entire range of molar fraction at 298. 15, 303. 15, 308. 15 and 313. 15 K. Excess molar volume and viscosity deviations were calculated. Excess molar volumes were fitted to the Redlich-Kister equation. The viscosities were correlated with four semi-empirical equations. Thermodynamic functions of activation of the binary systems were correlated. The results show that the excess molar volumes are positive and the viscosity deviations are negative at given temperature, and Delta H-not equal plays a major role in the mixing process.