RT info:eu-repo/semantics/article
T1 Thermodynamics of 2-alkanol + polar organic solvent mixtures. I. Systems with ketones, ethers or organic carbonates
A1 González López, Juan Antonio Mariano
A1 Hevia de los Mozos, Luis Fernando
A1 Sanz, Luis Felipe
A1 Lozano Martín, Daniel
A1 García de la Fuente, Isaías Laudelino
K1 Thermodynamics
K1 Polimeros y polimerización
K1 2-alkanol
K1 Polar solvent
K1 Thermodynamic data
K1 22 Física
AB The mixtures 2-propanol or 2-butanol + n-alkanone, or + acetophenone, or + linear monoether, or + cyclic ether, or + linear organic carbonate, or + propylene carbonate have been investigated using thermodynamic data, and in terms of the Flory theory, and the Kirkwood-Buff integrals. The data considered are: excess molar enthalpies (), volumes, entropies, and the temperature dependence of. The enthalpy of the 2-alkanol-solvent interactions have been determined, and the different contributions to discussed. It is shown that values of the 2-alkanol (fixed) + n-alkanone, or + linear carbonate mixtures change in the same manner that for n-alkanone, or linear carbonate + n-alkane (fixed) systems. In contrast, values of 2-alkanol (fixed) + linear monoether or + n-alkane mixtures change similarly. This set of results suggests that solvent–solvent interactions are determinant in systems with n-alkanone or linear carbonate, while interactions between alcohol molecules are determinant in mixtures with linear monoethers. According to the Flory model, orientational effects in systems with a given 2-alkanol become weaker in the sequence: linear monoether > linear organic carbonate > n-alkanone, and are stronger in solutions with a cyclic monoether than in those with cyclic diethers, and in systems with acetophenone or propylene carbonate than in the mixtures with the corresponding linear solvents. Results obtained from the Kirkwood-Buff integrals are consistent with these findings. The application of Flory model reveals that orientational effects are similar in systems with 1- or 2-alkanols, with the exception of solutions with linear monoethers, where such effects are stronger in mixtures containing 1-alkanols. For the examined systems, the formalism of the Kirkwood-Buff integrals makes no meaningful distinction between solutions with 1-alkanols or 2-alkanols.
PB Elsevier
SN 0167-7322
YR 2023
FD 2023
LK https://uvadoc.uva.es/handle/10324/64586
UL https://uvadoc.uva.es/handle/10324/64586
LA eng
NO Journal of Molecular Liquids, 2023, vol. 385, 122319
NO Producción Científica
DS UVaDOC
RD 17-jul-2024