Physical properties and interaction studies for polyethylene glycol 200 and 1,2-propanediamine system at temperature from 293.15 to 318.15 K under atmospheric pressure

In this work, density(rho) and viscosity(eta) of polyethylene glycol 200(PEG 200) and 1,2-propanediamine (1,2-PDA) system were measured at temperature from 293.15 to 318.15 K with temperature difference about 5 K under atmospheric pressure condition. In accordance with rho and eta, the excess molar volume (V-m(E)), the thermal expansion coefficient(alpha(p)), viscosity deviation(Delta eta), and the viscosity activation free energy(Delta G*(E)) were computed and corrected with Redlich-Kister(R-K) equation. In addition, the viscosity values of PEG 200 and 1,2-PDA system were fitted with the three-body McAllister semi-empirical models. The intermolecular interactions between PEG 200 and 1,2-PDA were analyzed by FTIR, UV-vis, and Fluorescence spectral results, which were intermolecular hydrogen bond, and the interaction mode was expressed as follow: -CH3CH(NH2) CH2(H-2)N center dot center dot center dot H-OCH2CH2-. According to the data of V-m(E) and Delta G*(E), it is known that when the molar ratio of PEG to 1,2-PDA was about 1:1, the interaction is strongest. Theoretically, CO2 capture absorption with this system can effectively inhibit the volatilization of amines. (C) 2022 Elsevier B.V. All rights reserved.

Automated summary

In this study, the density and viscosity of the polyethylene glycol 200 (PEG 200) and 1,2-propanediamine (1,2-PDA) system were measured at different temperatures. The intermolecular interactions between PEG 200 and 1,2-PDA were analyzed using various spectroscopic techniques, indicating the presence of hydrogen bonds. The results suggest that this system could be an effective option for CO2 capture absorption.