Binary Mixtures Of 2-methoxyethanol Research Articles

Study of heterogeneous interaction in binary mixtures of 2-methoxyethanol-water using dielectric relaxation spectroscopy

The dielectric relaxation measurements on binary mixtures of 2-methoxyethanol with water have been carried out over entire concentrations and at temperature range of 0 °C to 25 °C using a picosecond time domain reflectometry technique. The complex dielectric permittivity spectra of 2-methoxyethanol/water mixtures were fitted using Havriliak–Negami equation. The static dielectric constant and relaxation time for all concentrations were obtained using least square fit method. The principal relaxation time is small if compared to that of corresponding alcohol/water mixtures this may be due to the hydrogen bonding ether oxygen in the 2-ME-water system. Excess dielectric properties, Kirkwood correlation factor, thermodynamic properties and Bruggeman factor are also determined and the results are interpreted in terms of heterogeneous interactions among the unlike molecules due to hydrogen bonding.

Rheological, thermodynamic and ultrasonic study of binary mixtures containing 2-methoxyethanol and some alkan-1-ol

Density, ρ, and viscosity, η, of binary mixtures of 2-methoxyethanol with methanol, ethanol, propan-1-ol, butan-1-ol, pentan-1-ol, hexan-1-ol, and heptane-1-ol are determined over the entire range of composition at 298.15, 308.15, and 318.15 K. The speed of sound, u, of the above binary mixtures has been measured at 298.15 K. The experimental values of densities, viscosities, and speeds of sound are used to calculate the excess molar volume V E, viscosity deviation Δη, excess isentropic compressibility , excess acoustic impedance Z E, and excess intermolecular free length . The viscosity data have been correlated by Grunberg and Nissan, Tamura–Kurata and Hind correlation equations. The V E, Δη, , Z E, and are fitted to the Redlich–Kister equations. The results are discussed in terms of molecular interactions and structural effects.

Densities and excess molar volumes for binary mixtures of some glycols in 2-methoxyethanol at T = (293.15, 298.15 and 303.15) K

Densities at T = (293.15, 298.15, and 303.15) K in the binary mixtures of 2-methoxyethanol with diethylene glycol, triethylene glycol and tetraethylene glycol have been measured as a function of composition. From the experimental data excess molar volumes have been calculated, and the deviations are fitted to a Redlich–Kister equation to obtain the binary coefficients and estimate the standard deviations between the experimental and calculated quantities. The results are discussed in terms of intermolecular interactions in the bulk of the studied binary mixtures.

Speed of sound of some aliphatic amines with 2-methoxyethanol mixtures at 298.15 K

The speed of sound of binary mixtures of 2-methoxyethanol with diethylamine, triethylamine, propylamine, dipropylamine, sec-butylamine and tert-butylamine has been measured as a function of composition at 298.15 K. From the experimental data, values of deviations in the speed of sound (Δu) and isentropic (Δκ) compressibility from ideality have been calculated. The results for Δu and Δκ are discussed on the basis of intermolecular interactions between the components of the analysed mixtures.

Density, relative permittivity, viscosity and speed of sound for 2-methoxyethanol + isobutylamine mixtures

Densities (ρ), relative permittivities (ε), viscosities (η), and speeds of sound (u) at 298.15 K of binary mixtures of 2-methoxyethanol (1) + isobutylamine (2), are reported. From all those data, the excess molar volumes, and deviations from mole fraction additivity of the relative permittivity (Δε), viscosity (Δη), speed of sound (Δu), and isentropic compressibility (Δκ) have been calculated. The results for V E, Δε, Δln η, Δu, and Δκ are discussed on the basis of intermolecular interactions between the components of the analysed mixtures.

Refractive properties of binary mixtures containing 2-methoxyethanol and diethylamine, triethylamine, and propylamine

Refractive indexes (n D ) of numerous binary mixtures of 2-methoxyethanol + diethylamine, 2-methoxyethanol + triethylamine, and 2-methoxyethanol + propylamine, between 288.15 and 308.15 K, are reported. Furthermore, the excess molar refraction (R E ) and deviation from ideality refractive index (Δn D ) have been examined, in order to identify the presence of intermolecular complexes in these binary liquid mixtures.

Dielectric properties of 2-methoxyethanol + isobutylamine, 2-methoxyethanol + sec-butylamine, and 2-methoxyethanol + tert-butylamine binary mixtures

Relative permittivities of numerous binary mixtures of 2-methoxyethanol (1) + isobutylamine (2), 2-methoxyethanol (1) + sec-butylamine (2), and 2-methoxyethanol (1) + tert-butylamine (2), between 291.15 and 313.15 K, are reported. These results are used to calculate deviations in the relative permittivities. The results are fitted to the Redlich–Kister polynomial equation to estimate the binary coefficients and standard errors. Furthermore, the experimental results are used to expose the nature of binary interactions in the bulk of the binary mixtures studied.

Densities and relative permittivities for mixtures of 2-methoxyethanol with dea and tea, at various temperatures

Densities (e) and relative permittivities (e) of numerous binary mixtures of 2-methoxyethanol (ME) (1)+diethylamine (DEA) (2) at four temperatures and 2-methoxyethanol (1)+triethylamine (TEA) (2) at five temperatures, between (291.15 and 313.15) K, are reported. These results are used to calculate excess molar volumes, and deviations in the relative permittivities. The results are fitted to the Redlich-Kister polynomial equation to estimate the binary coefficients and standard errors. Furthermore, the experimental results are used to disclose the nature of binary interactions in the bulk of studied the binary mixtures.

Conductance of selected alkali metal salts in aqueous binary mixtures of 2-methoxyethanol at 25°C

Precise conductance measurements have been performed for lithium perchlorate, lithium tetrafluoroborate, lithium hexafluoroarsenate, sodium perchlorate, and sodium tetraphenylborate in 2-methoxyethanol–water mixtures at four different mole fractions, i.e., 0.056, 0.136, 0.262, and 0.486 of 2-methoxyethanol (69.73 ≥ D ≥26.55) at 25°C in the concentration range 0.0004–0.0642 mol-dm−3. The limiting molar conductivity Λ°, the association constant KA, and the association distance R for the solvent mixtures have been evaluated from the conductance concentration data using the 1978 Fuoss conductance equation. The single-ion conductances have been estimated using the “reference electrolyte” tetrabutylam-monium tetraphynylborate(Bu4NBPh4). The analysis of the data indicates that for most salts ion association is appreciable in the solvent mixtures with a mole fraction of the cosolvent of 0.262 or higher. The results have been interpreted in terms of ion-solvent interactions and structural changes in the mixed solvent media.

Thermodynamic Interactions in Binary Mixtures of 2-Methoxyethanol with Alkyl and Aryl Esters at 298.15, 303.15 and 308.15 K

Densities, viscosities, refractive indices, and sound velocities of 2-methoxyethanol + ester mixtures have been measured at 298.15, 303.15 and 308.15 K. These data have been used to calculate excess volume, excess isentropic compressibility, excess refraction, excess viscosity and excess Gibbs energy of activation of flow. These quantities have been fitted to quadratic equations to estimate the parameters and standard errors. The results have been interpreted in term of the intermolecular interactions between the mixing components.