Investigations of viscometric properties of 1,2-ethanediol + 1,2-dimethoxyethane binary mixtures

Kinematic Viscosities of pure ethane-1,2-diol (ED,1) and of nine mixtures with 1,2-dimethoxyethane (DME, 2) were measured at 19 temperatures ranging from -10 to +80 °C, and for binary compositions covering the whole miscibility field expressed by the relation 0 less than or equal to X(1) less than or equal to 1. The property fitted some empirical equations in terms of the dependences nu = nu(T) and nu(X(1)). Furthermore, the excess function (nu(E)) and the excess Gibbs energy of activation of viscous flow (Delta G*(E)) have been investigated. The trend of nu(E) against binary composition of the mixtures shows negative deviations from ideal behaviour. The results indicate specific molecular interactions between the components, and an overview is given on the basis of the molecular dynamics of the pure species.