Excess properties and spectroscopic studies for binary system of polyethylene glycol 600+1,2-ethanediamine at T = (298.15, 303.15, 308.15, 313.15, and 318.15) K

Density (rho) and viscosity (eta) data for the binary system of polyethylene glycol 600 (PEG) + 1,2-ethanediamine (EDA) over the entire concentration range at a number of temperatures T = (298.15, 303.15, 308.15, 313.15, and 318.15) K as a function of composition were measured under atmospheric pressure. On the basis of experimental density and viscosity data, the excess properties of PEG (1) + EDA (2) mixtures, including excess molar volumes (V-m(E)), viscosity deviations (Delta eta), excess free energies of activation (Delta G*(E)), apparent molar volumes (V phi,1 and V phi,2), partial molar volumes ((V-1) over bar and (V-2) over bar), and isobaric thermal expansion coefficient (alpha(p)), were calculated. Meanwhile, the values of V-m(E), Delta eta, and Delta G*(E) were fitted with the Redlich-Kister equation to derive coefficients and to evaluate the standard deviations (a) between the experimental and calculated values. Moreover, on the basis of FTIR and UV-vis spectral data of PEG (1) + EDA (2) mixtures with various concentrations, the intermolecular interaction of PEG with EDA was discussed. (C) 2016 Elsevier B.V. All rights reserved.