Studies on Intermolecular Interactions in Binary Liquid Mixtures of 2-Methyl-1-butanol with Glycol Ethers {CH₃(OCH₂CH₂)_nOH}, n = 1,2,3 at Different Temperatures: A Volumetric, Acoustic and Transport Study

In the present study, measurements of experimental density (ρ), viscosity (η) and speed of sound (u) of binary liquid mixtures of 2-methyl-1-butanol with ethylene glycol monomethyl ether, diethylene glycol monomethyl ether and triethylene glycol monomethyl ether have been carried out within the temperature range of 298.15–308.15 K with an interval of 5 K. Using the experimental data, excess properties such as excess molar volume ( \({V}_{m}^{E}\) $V_m^E$ ), excess molar isentropic compressibility ( \({K}_{s,m}^{E}\) $K_{s,m}^E$ ), excess speed of sound ( \({u}^{E}\) $u^E$ ), deviation in viscosity (Δη) and excess Gibbs free energy of activation for viscous flow ( \(\Delta {G}^{{\ast}E}\) $\mathrm{\Delta }{G}^{*E}$ ) have been calculated to study the intermolecular interactions present in these liquid mixtures. By comparing the standard deviation values the correlation ability of various proposed viscosity models has also been tested. Further, to rationalize the excess volume data Prigogine–Flory–Patterson (PFP) theory has also been studied.