Excess properties, spectra, and computational chemistry for binary mixtures of 1,2-propanediol+1,3-Diaminopropane

Liquid density (rho), viscosity (eta) and surface tension (gamma) of a binary system of 1,2-propanediol (PPD) + 1,3-Diaminopropane (PDA) with different composition were systemically measured at six temperatures from 293.15 K to 318.15 K. Based on these obtained values, their excess properties, apparent molar volumes (V-phi,V-1 and V-phi,V-2) and partial molar volumes ((V) over bar (1) and (V) over bar (2)) were calculated. The excess properties were fitted with Redlich-Kister equation. Additionally, the Grunberg-Nissan and three-body McAllister semi-empirical models were used to fit the viscosity values. Furthermore, UV, FTIR and H-1 NMR spectra and computational chemistry confirmed that there was hydrogen bonding between PDA and PPD in the binary system as.HOCH2(CH3) CH2O-H center dot center dot center dot N(H-2)(CH2)(3)N(H-2)center dot center dot center dot. (C) 2020 Elsevier B.V. All rights reserved.