Density, viscosity, surface tension, and spectral analysis of polyethylene glycol 300+1,2-Propylenediaminebinary liquid mixture

At T= 293.15 similar to 318.15 K, the density (rho), viscosity (eta), and surface tension (gamma) data of polyethylene glycol 300 (PEG300) and 1,2-propane diamine (1,2-PDA) binary liquid mixture in the entire composition range were systemically measured. Meanwhile, the influence of different temperatures on the physical properties of the binary liquid mixture was deeply discussed. The values of rho and eta of PEG300 were compared with the reported values of rho and eta of different linear alcohols under the same experimental conditions. It was found that the values of rho and eta of linear alcohols were related to the number of carbon chains. Under isothermal conditions, the values of rho and eta increased with the number of carbon chains. After that, excess molar volume (V-m(E)), excess viscosity (eta(E)), surface tension deviation (Delta gamma), excess Gibbs energy of activation of viscous flow (Delta G*(E)), and molar isobaric thermal expansion (E-p,E-m) of PEG (1) + 1,2-PDA (2) binary mixture were calculated. The eta values were fitted with four semi-empirical formulas, and the V-m(E), eta(E), and Delta gamma values were fitted with Redlich-Kister (R-K) equation. IR, UV, FLS, and Raman spectral technologies were used to further prove the interaction among different molecules of the liquid mixture. (C) 2022 Elsevier B.V. All rights reserved.