Density, viscosity and excess properties for binary system of 1.2-ethanediamine + polyethylene glycol 400 at T = (293.15, 298.15, 303.15, 308.15, 313.15, and 318.15) K under atmospheric pressure

Density (ρ) and viscosity (η) data for the binary system of polyethylene glycol 400 (PEG) + 1.2-ethanediamine (EDA) over the whole concentration range as a function of composition were measured at T = (293.15, 298.15, 303.15, 308.15, 313.15, and 318.15) K under atmospheric pressure. Based on experimental density and viscosity data, the excess properties of the PEG (1) + EDA (2) mixtures, including excess molar volume (VmE) and viscosity deviation (∆ η), excess free energies of activation (∆ G*E), apparent molar volume (Vφ,1 and Vφ,2), and partial molar volumes (V1̅ and V2̅), were calculated respectively. Meanwhile, the results of VmE, ∆ η and ∆ G*E were fitted by a Redlich-Kister equation to obtain coefficients and to evaluate the standard deviations (σ) between the experimental and calculated quantities. Additionally, based on FTIR and UV-Vis spectral results of PEG (1) + EDA (2) mixtures with various concentrations, intermolecular interaction of PEG with EDA was discussed.