To explore the properties and associations between liquid mixtures, excess molar volumes and deviation in the viscosity were analyzed using the experimental density and viscosity of 4-methylphenol and 2-alkanols (C3−C6), including 2-propanol, 2-butanol, 2- pentanol, and 2-hexanol, at various temperatures and 0.1 MPa pressure. The Redlich−Kister equation was employed for determining excess and deviation properties. The findings suggest strong intermolecular associations within liquid solutions with a weaker bond strength in higher alkanols. The density of liquid mixtures and pure fluids was modeled by using the perturbed-chain statistical associating fluid theory (PC-SAFT) model, resulting in a maximum deviation of 1.16% for binary mixtures of 4-methylphenol with 2-pentanol. Our analysis showed that PC-SAFT can effectively model the density of both pure liquids and solutions, providing accurate predictions and correlations. This approach can be valuable in understanding the behavior of different liquids and their interactions and can potentially aid in the development of new mixtures with desired properties.
