Transport Properties of Liquids, III. Viscosity of Athermal Liquid Mixtures

The mass density ρ and the dynamic viscosity ρ of eleven binary liquid mixtures were measured as a function of concentration and temperature, in order to study the influence of the entropy of mixing on the viscosity of athermal liquid mixtures.—ζ was determined via an Ubbelohde micro‐viscosimeter and ρ via a vibrating densimeter.—The species of the mixtures differ to a large extent in size and in mass only (Si‐, Sn‐, and Ti‐Tetraalkyl and Tetraalkoxy compounds).—With the Grunberg‐Nissan equation the experimental data can be described in good approximation. As a measure for the non‐ideal behaviour of the mixtures, the Grunberg‐Nissan Parameter ρ is correlated with the difference of the molecular diameter of the components, and with the entropy of mixing.