Experiment and model for the viscosities of MEA-PEG400, DEA-PEG400 and MDEA-PEG400 aqueous solutions

• The viscosities of the amine-PEG400 aqueous solutions were measured.
• The experiments were modeled satisfactorily by using the Weiland equation.
• The effect of mass fractions of amine and PEG400 on the viscosity was illustrated.
• The temperature dependence of the viscosity was demonstrated.

The viscosities (η) of poly(ethylene oxide)400 (PEG400), monoethanolamine (MEA)-PEG400, diethanolamine (DEA)-PEG400 and N-methyldiethanolamine (MDEA)-PEG400 aqueous solutions were measured by using the NDJ-5S digital rotational viscometer. A thermodynamic equation was used to model the viscosities and the calculated results are satisfactory. The effects of temperature, mass fractions of amines and PEG400 on the viscosities were demonstrated on the basis of experiments and calculations.