Effect of Temperature on Density and Viscosity for Methanol (1) + IGEPAL (2) (CO-720, CA-720, and CO-630) at Atmospheric Pressure

Abstract

Understanding thermodynamic properties in mixtures, particularly those of interest to industries, such as solvents and surfactants, is crucial for comprehending the intermolecular forces that govern these systems. Accurate data on the volumetric and transport properties of solvent–surfactant mixtures are valuable from an academic and industrial perspective. In this paper, we present an experimental study that resulted in 188 data points of density and viscosity for binary mixtures of methanol and IGEPAL (CO-720, CA-720, and CO-630) measured at atmospheric pressure within a temperature range of T = (293.15, 303.12, 313.15, and 323.15) K. Furthermore, based on these experimental findings, we calculated the following derivative properties: excess molar volume, viscosity deviation, and isobaric thermal expansion coefficient. All binary mixtures studied here exhibited regular liquid behavior with attractive intermolecular forces because of the high association between alcohol and surfactant components.