Viscosities for binary liquid mixtures of some cellosolves with water at 298.15 K

Abstract

Viscosities (η) of three binary mixtures (cello-solve + water) have been measured as a function of mole fraction at 298.15 K using an Ubbelohde viscometer. The cellosolves were 2-[2-(2-methoxyethoxy)ethoxy] ethanol, 2-[2-(2-ethoxyethoxy )ethoxy]ethanol, and 2-[2-(2-butoxyethoxy)ethoxy]ethanol. From the experimental results, excess logarithmic viscosities (In η^E) and excess energies of activation for viscous flow (<img src='/image/spc_char/delta.gif' border=0><i>G </i>*E) have been calculated. All the mixtures show positive excess functions over the entire concentration range and which increase as the aliphatic chain of the cellosolve increases. The results are discussed on the basis of molecular interactions between the components of the mixtures.