Static permittivities of n-propanol mixtures with ethanol, isomers of propanol, and butanol at temperature (288.15–308.15) K

Abstract

The relative static permittivities of six binary systems of n-propanol with ethanol, i-propanol, isomeric butanols are reported as a function of composition at temperatures 288.15 K; 293.15 K; 298.15 K; 303.15 K and 308.15 K. From the experimental results, the excess relative permittivity, ε r E , the permittivity temperature coefficient, ( ∂lnε r / ∂T ), and their excess values at the 298.15 K were calculated. The excess parameters have been fitted to the Redlich–Kister polynomial equation. The results on dielectric measurements were used in the analysis of the hydrogen bond intermolecular interactions occurring between the constituents of alcohol mixture, their dependence on the number of carbon atoms, and the position of the hydroxyl group in the structure of molecules (the type of alcohols). ► Values ε r of mixtures of n-propanol with six alcohols (C1–C4) have been determined. ► Values ε r E , ∂ l n ε r / ∂ T and ∂ l n ε r / ∂ T E at the 298.15 K have been calculated. ► The excess parameters have been fitted to the Redlich–Kister polynomial equation. ► Intermolecular interactions were analyzed.