Density and viscosity measurements were performed on binary liquid mixtures of diethylamine and 2-propanol, 2-butanol and 2-pentanol at temperatures (293.15 to 323.15) K and ambient pressure. Using these experimental data, excess molar volumes V-m(E), and viscosity deviations Delta eta, have been calculated. Results were analyzed to gain insight about liquid mixture interactions. Also the friction theory founded on the PC-SAFT model was used to calculate the viscosities of binary mixtures. The model, which links viscosity to the repulsive and attractive pressure terms of the PC-SAFT model, performs very well in all cases, with a global average absolute deviation of 3% and shows predictive capabilities for heavier compounds. (C) 2015 Elsevier Ltd. All rights reserved.