화학공학소재연구정보센터
Fluid Phase Equilibria, Vol.397, 68-80, 2015
Effect of various substituents on benzene ring and their impact on volumetric, acoustic and transport properties of binary liquid mixtures with dimethylacetamide
Excess volume (V-E), excess isentropic compressibility (K-S(E)) and deviation in viscosity (Delta(eta)) were studied for eight binary systems of dimethylacetamide (DMA) with 1,2-dichlorobenzene, 1,3-dichlorobenzene, 1,2,4-trichlorobenzene, o-chlorotoluene, m-chlorotoluene, p-chlorotoluene, o-nitrotoluene and m-nitrotoluene in the entire composition range at 303.15 K and atmospheric pressure. Excess volume data for the studied mixtures were measured directly using a single composition loading type dilatometer and compared with predictive expressions proposed by Redlich-Kister and Hwang. Moreover, the V-E data in the present investigation were analyzed by using Prigogine-Flory-Patterson (PFP) theory. The speed of sound data was measured with a single crystal interferometer at a frequency of 3 MHz and data were analyzed in terms of free length theory (FLT) and collision factor theory (CFT). Experimental viscosity data were measured by a suspended Ubbelohode-type viscometer, which in turn used to calculate deviation in viscosity and interaction parameters for various models such as Gruenberg-Nissan, Tamura and Kurata and Hind et al. The experimental data were discussed on the basis of intermolecular interactions between unlike molecules. (C) 2015 Elsevier B.V. All rights reserved.