Density, viscosity, surface tension and spectroscopic studies for the liquid Of mixture of tetraethylene glycol plus N,N-dimethylformamide at six temperatures

Density (rho), viscosity (eta) and surface tension (gamma) are always significant physicochemical properties for liquid mixtures. In this work, the rho, eta and gamma data for the liquid mixture of tetraethylene glycol (T(4)EG) + N,N-dimethylformamide (DMF) were systemically measured from 293.15 to 318.15 K with a step of 5 K and p = 0.1 MPa. From these physicochemical properties, viscosity deviation (Delta eta), excess molar volume (V-m(E)), and surface tension deviation (Delta gamma) were calculated. Meanwhile, V-m(E), Delta eta and Delta gamma of activation functions were fitted with Redlich-Kister (R-K) equation to evaluate the coefficients and standard deviations. The eta values of the liquid mixtures were fitted with Grunberg and Nissan equation and three-body McAllister expression. UV-vis and FIR spectra were measured to discuss the intermolecular interaction of T(4)EG with DMF, which indicated that there was hydrogen bonds interaction between hydroxyl hydrogen atoms in T(4)EG and oxygen atoms in DMF. (C) 2018 Elsevier B.V. All rights reserved.