Diana M. Cristancho

Volumetric properties of the octyl methoxycinnamate + ethyl acetate solvent system at several temperatures

In this article, the excess molar volumes and partial molar volumes of components of the binary system octyl methoxycinnamate (OMC) + ethyl acetate (AcOEt) were investigated from density measurements on the entire range of mass fractions for this system at 298.15, 303.15, 308.15, 313.15, and 318.15 K. The results of excess molar volumes were fitted by the Redlich–Kister equation using third degree polynomials. The system exhibited negative excess volumes (up to −0.926 cm3 mol−1 at 318.15 K), probably due to interactions like dispersion forces between unlike molecules or some differences in the molar volumes of pure components. The effect of temperature on the different volumetric properties studied was also analysed. Besides, the volumetric thermal expansion coefficients were also calculated finding values varying from 7.53 × 10−4 K−1 for pure OMC up to 1.38 × 10−3 K−1 for pure AcOEt at 308.15 K.