Studies on Excess Volume, Viscosity, and Speed of Sound of Binary Mixtures of Methyl Benzoate in Ethers at T=(303.15,308.15, and 313.15) K

Abstract

Densities, viscosities, and speed of sound have been determined at T = (303.15, 308.15, and 313.15) K for the binary mixtures of methyl benzoate with tetrahydrofuran, 1,4-dioxane, anisole, and butyl vinyl ether over the entire range of composition. Using these measured values, excess volume , deviation in viscosities Δ , excess Gibb's free energy of activation for viscous flow Δ * , and deviation in isentropic compressibility Δ have been calculated. These calculated binary data have been fitted to Redlich-Kister equation to determine the appropriate coefficients. The values of excess volume and deviation in viscosities Δ are negative over the entire range of composition for all the binary systems at the studied temperatures. The behavior of these parameters with composition of the mixture has been discussed in terms of molecular interactions between the components of liquids.

Controlling the Aspect Ratio of Supramolecular Fibers by Ultrasonication

“…Higher viscosities are known to promote a more violent cavity collapse, thus promoting fragmentation . To establish a correlation between the viscosity and the fiber length, we have taken the viscosities of MCH and n ‐hexane at −15 °C from literature and calculated the viscosity of anisole by extrapolation of literature data using a quadratic equation . In Figure , dispersion medium viscosity versus submicron fiber length after 20 min is shown.…”

“…Influence of the viscosity of the dispersion media on the submicron fiber length after 20 min of sonication (power: 23 W) at a concentration of 1000 ppm. Viscosity values were taken from literature; in case of anisole, values were obtained by extrapolation of literature values …”