Densities, ultrasonic speeds, excess and partial molar properties of binary mixtures of acetonitrile with some alkyl methacrylates at temperatures from 293.15 K to 318.15 K

Highlights: • Study reports new density and speed of sound data of acetonitrile (ACN) + alkyl methacrylate binary mixtures. • Provides estimation of excess properties of ACN + alkyl methacrylate mixtures. • Provides information on nature of interactions in these mixtures. The densities, ρ, and speed of sound, u, of the binary mixtures of acetonitrile with alkyl methacrylates (methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, including those of pure liquids, over the entire composition range were measured at temperatures (293.15, 298.15, 303.15, 308.15, 313.15 and 318.15) K and atmospheric pressure. Using the experimental data, the excess molar volumes, $V_{\text{m}}^{\text{E}}$, excess speeds of sound, $u^{\text{E}}$, excess isentropic compressibilities, ${\kappa }_{\text{s}}^{\text{E}}$ and excess molar isentropic compressibilities, $K_{\text{s,m}}^{\text{E}}$ have been calculated. The partial molar volumes and compressibilities and excess partial molar volumes and compressibilities of the components of the mixtures over the whole composition range; and at infinite dilution have also been calculated. The excess properties were correlated by the Redlich–Kister polynomial equations. The variations of these parameters with composition and temperature have been discussed in terms of intermolecular interactions prevailing in these mixtures.