Volumetric, acoustic, viscometric, and spectroscopic properties for binary mixtures of dipropylene glycol dimethyl ether plus n-alkylamine mixtures at 298.15 K
Pal, A; Gaba, R
| HERO ID | 4949023 |
|---|---|
| In Press | No |
| Year | 2007 |
| Title | Volumetric, acoustic, viscometric, and spectroscopic properties for binary mixtures of dipropylene glycol dimethyl ether plus n-alkylamine mixtures at 298.15 K |
| Authors | Pal, A; Gaba, R |
| Journal | Journal of the Indian Chemical Society |
| Volume | 84 |
| Issue | 7 |
| Page Numbers | 661-673 |
| Abstract | The excess molar volume (V(m)(E)), ultrasonic speed (u), and dynamic viscosity (eta) have been measured in dipropylene glycol dimethyl ether + butylamine, dibutylamine, and tributylamine across their entire composition ranges at 298.15 K and atmospheric pressure. The density values derived from the excess molar volumes were converted to molar volumes (V) which are combined with the speed of sound to obtain estimates of the product K(S,m), and their excess counterparts K(S,m)(E). in all mixtures the excess molar volumes are negative and symmetric across the entire composition range. The K(S,m)(E) values are positive for all mixtures. The deviation of the speeds of sound u(D) from their ideal values u(id) in-an ideal mixture were also calculated for all measured mole fractions. Viscosities have also been measured for mixtures of dipropylene glycol dimethyl ether and butylamine, dibutylamine, or tributylamine at the same temperature. From the experimental data, the deviation in the viscosity eta from Sigma x(i) ln eta(i) and excess energies of activation for viscous flow (Delta G*(E)) have been derived for all systems. The Flory theory of mixtures provides a useful basis for a quantitative interpretation of the viscosity results. The theoretical values of molar isentropic compressibility (K(S,m)) and of speed or sound (u) have been estimated using the Prigogine-Flory-Patterson (PFP) theory with the van der Waals (vdW) potential energy model and the results have been compared with experimental values. |
| Wosid | WOS:000207472300010 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | Binary mixtures; dynamic viscosity; spectroscopy; ultrasonometry |