Volumetric and viscosimetric measurements for methanol + CH3-O- (CH2CH2O)n-CH3 (n = 2, 3, 4) mixtures at (293.15-303.15) K

Abstract

Densities and kinematic viscosities of binary mixtures of methanol + 2,5,8-trioxanonane, or + 2,5,8,11-tetraoxadodecane, or + 2,5,8,11,14-pentaoxapentadecane have been measured over the whole composition range at 293.15, 298.15 and 303.15 K and atmospheric pressure. Densities were determined using a vibrating-tube density meter and viscosities were measured with an automatic Ubbelohde capillary viscometer. The experimental results have been used to calculate the excess molar volumes, V E m , and the deviations of dynamic viscosity, . Moreover, viscosity data were correlated by some semi-empirical equations (Grunberg-Nissan, Hind, Frenkel, Katti- Chaudhri, McAllister and Heric). The large and negative V E m and the positive values obtained seem to remark the predominant contribution of free volume effects on interactional effects to these thermophysical properties.