Density, viscosity, excess properties, and spectral analyses of polyethylene glycol 300 and 1,3-propane diamine binary system
Xing Qin, Fu Li, Liting Kong, Rumeng Zhang, Xuan Liu, Jialin Wu, Jianbin Zhang
Abstract
This work reported the fundamental density (ρ) and viscosity (η) data of polyethylene glycol 300 (PEG) (1) + 1,3-propane diamine (DAP) (2) binary system at T = (293.15 to 318.15) K and atmospheric pressure, in which excess-molar volume (VmE) of the binary system presented the lowest values when x1 was at 0.5. Concurrently, the η values increased firstly and diminished in the same composition range; when x1 was at 0.7, the η values of the binary system arrived at the largest values; and the smallest and largest viscosity deviation (Δη) values of binary system were found at x1 ≈ 0.1 and x1 ≈ 0.6, respectively. Additionally, UV-Vis, FLS, 1H-NMR and Raman spectral results suggested that there was hydrogen bonding of ‘hydrogen atom in -OH groups of PEG binding nitrogen atom in -NH2 groups of DAP to form the hydrogen bonds of N···H-O’.