Dependence on both the hydrocarbon chain length and the hydroxyl group position of the thermophysical properties of N, N-dimethylacetamide with n-alkanol or 2-alkanol

Mrad, S. ; Abidi, R. ; Artigas, H. (Universidad de Zaragoza) ; Hichri, M. ; Lafuente, C. (Universidad de Zaragoza)

Resumen: This work reports thermophysical properties measurements of binary mixtures of N, N-dimethylacteamide with 1-pentanol and 2-pentanol. Density, ¿, speed of sound, u, refractive index, nD, and kinematic viscosity, ¿, were measured over the whole composition range at the temperatures (283.15, 298.15 and 313.15) K and at atmospheric pressure p = 0.1 MPa. Experimental data were used to calculate the following properties: excess molar volume, VE, excess isentropic compressibility, ¿SE, refractive index deviation, ¿nD, and viscosity deviation, ¿¿. These properties were correlated with mole fraction or volume fraction using the Redlich-Kister equation. Excess molar volumes were positive for both mixtures although there are some slight negative VE values for the system containing 1-pentanol at lower temperatures and at lower mole fractions. Refractive index deviation behaviour against composition for (N, N-dimethylacetamide + 1-pentanol) was sigmoidal at lower temperatures and negative at T = 313.15 K, on the other hand ¿nD values are negative for the mixture with 2-pentanol. Excess isentropic compressibilities and viscosity deviations were negative for the two systems. The results obtained were interpreted based on both structural and energetic effects. These results were further compared with our previous results for mixtures containing N, N-dimethylacetamide and several n-alkanols or 2-alkanols in order to understand both the influence of the hydrocarbon chain length and the hydroxyl group position.

Idioma: Inglés

DOI: 10.1016/j.jct.2020.106258

Año: 2021

Publicado en: JOURNAL OF CHEMICAL THERMODYNAMICS 152 (2021), 106258 [8 pp]
ISSN: 0021-9614

Factor impacto JCR: 3.269 (2021)

Categ. JCR: THERMODYNAMICS rank: 25 / 63 = 0.397 (2021) - Q2 - T2
Categ. JCR: CHEMISTRY, PHYSICAL rank: 98 / 165 = 0.594 (2021) - Q3 - T2

Factor impacto CITESCORE: 6.0 - Physics and Astronomy (Q1) - Materials Science (Q1)

Factor impacto SCIMAGO: 0.665 - Materials Science (miscellaneous) (Q2) - Atomic and Molecular Physics, and Optics (Q2)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E31-20R

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Química Física (Dpto. Química Física)