Viscometric studies of molecular interactions in binary mixtures of ethylbenzene with (C4 to C8) Alkan-1-ols

Dynamic viscosities (eta(exp)) for binary mixtures of ethylbenzene with butan-1-ol, pentan-1-ol, hexan-1-ol, heptan-1-ol, and octan-1-ol were measured at varying temperatures (298.15-323.15 K; interval, 5 K) and atmospheric pressure. Viscosity deviations (Delta(eta)) across the entire range of mole fractions were derived from eta(exp) and were correlated using a Redlich-Kister type polynomial expression. The eta(exp) were compared with those calculated, eta(cal), in terms of the pure components and the adjustable interaction parameters derived from eta(exp) using Arrhenius, Kendall-Monroe, Grunberg-Nissan, Teja-Rice, and Andrade/DIPPR models to evaluate the validity of the predictive and correlative approaches. The temperature-induced variations in eta(exp) were discussed considering the impact of the increasing chain-length of alkanols, including molecular interactions among the component molecules in the binary mixtures. A computational quantum mechanical modeling approach, density-functional theory, was used to explore the dimensions in interactions among the binary mixture components. (C) 2021 Elsevier B.V. All rights reserved.