VISCOSITY OF THE BINARY-SYSTEMS CONTAINING TRIFLUOROETHANOL, WATER AND TETRAETHYLENE GLYCOL DIMETHYL ETHER - PREDICTION OF THE TERNARY VISCOSITY FROM BINARY DATA

Kinematic viscosities were measured over the entire range of compositi on and at atmospheric pressure for the binary systems trifluoroethanol (TFE)-H2O, TFE-tetraethylene glycol dimethyl ether (TEGDME), and TEGD ME-H2O from 293.15 to 333.15 K. The data were fitted by the Stephan an d Heckenbergber (1989) correlation, which accounts for the dependence on temperature and mixture composition. Methods for predicting ternary excess viscosities from excess viscosity data for the three binary mi xtures involved are examined and tested for the system TFE-H2O-TEGDME at 303.15 K by comparing predicted and experimental data. The empirica l correlation of Colinet (1967) is shown to be the best for this syste m.