Volumetric and viscosimetric measurements for methanol + CH3-O- (CH2CH2O)n-CH3 (n = 2, 3, 4) mixtures at (293.15-303.15) K
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...
| Autor: | |
|---|---|
| Tipo de recurso: | tesis de maestría |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Universidad de Valladolid |
| Repositorio: | UVaDOC. Repositorio Documental de la Universidad de Valladolid |
| OAI Identifier: | oai:uvadoc.uva.es:10324/38466 |
| Acceso en línea: | http://uvadoc.uva.es/handle/10324/38466 |
| Access Level: | acceso abierto |
| Palabra clave: | Density Viscosity Methanol |
| Sumario: | 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. |
|---|