Density and Viscosity of Polyethylene Glycol 400+1,2-Propanediamine Binary Mixtures at T = (293.15-318.15) K and Spectral Analysis

In this study, the density (rho) and viscosity (eta) of binary mixed solutions of PEG400 and 1,2-PDA at T = (293.15-318.15) K under atmospheric pressure were determined. With these data, the mixed solutions were investigated for excess properties, i.e., deviation viscosity (?eta), excess molar volume (V-m(E)), and excess Gibbs free energy (?G(*E)). The deviations of delta eta, V-m(E), and ?G(*E) from ideal solution behavior are indicative of strong intermolecular interactions between PEG400 and 1,2-PDA. Through the study of the spectral properties of the mixture (FTIR, Raman, UV-Vis, FLS, and H-1.NMR), it is more clearly proved that the interaction between the molecules of the mixture is hydrogen bonding. The results provide a basis for engineering design, and fundamental data for the application of the binary system in a wider range of fields.