Measurement and modeling of viscosity for binary mixtures of diisopropyl ether with n-alkanes (C7–C10)

The kinematic viscosity (ν) of binary mixture of diisopropyl ether+n-heptane or n-octane or n-nonane or n-decane was measured at 298.15 K, 308.15 and 318.15 K. Using experimental data, the deviation in kinematic viscosity (Δν) was calculated. The Δν follows the sequence: n-heptane<n-octane<n-nonane<n-decane. The kinematic viscosity data were correlated by using various empirical equations suggested by Heric-Brewer, Krishnan-Ladda, Lulian et al. Predicted data using these empirical equations agree well with the experimental data. Kinematic viscosity data was also analyzed by applying the McAllister equation. Dynamic viscosity (η) for binary mixture of diisopropyl ether (DIPE)+n-heptane or n-octane was calculated using density data reported in earlier papers. Deviation in dynamic viscosity (Δη) was also calculated. Bloomfield and Dewan model was used to predict dynamic viscosity, and the predicted values agree well with experimental data for the present binary systems. The Δν and Δη values were fitted to Redlich-Kister polynomial equation. The effect of temperature on kinematic viscosity was also studied.