INVESTIGATIONS ON THE VISCOMETRIC PROPERTIES OF ETHANE-1,2-DIOL+1,2-DIMETHOXYETHANE BINARY-MIXTURES

The kinematic viscosity (nu) of pure ethane-1,2-diol (ED), 1,2-dimethoxyethane (DME) and nine binary mixtures at nineteen temperatures ranging from -10 to +80-degrees-C has been measured. The experimental values have been used to test some empirical equations of the type nu = nu(T) and nu = nu(x1), which are also suitable for data fits in the case of strongly associated dipolar components in the mixtures. The chainlike self-association of ED is widely reflected in its viscosity, which is considerably greater than that of DME. The viscosities of all the mixtures increase on passing from the values of pure DME to pure ED as the mole fraction of ED increases, and the mixing process always gives rise to negative excess properties (nu(E)) at all the temperatures investigated. Furthermore, thermodynamic parameters of viscous flow have been evaluated on the basis of Eyring's theory.