Measurements revealed density and viscosity changes in glycol mixtures, indicating temperature impacts on excess volumes.
Density and viscosity were measured for aqueous mixtures of monoethylene glycol (MEG), diethylene glycol (DEG), triethylene glycol (TEG), and tetraethylene glycol (TeEG) across the full concentration range. Measurements were performed at 293.15, 313.15, and 333.15 K under atmospheric conditions, yielding 222 new data points. Density data were used to calculate excess volumes, revealing negative deviations from ideal behaviour. Temperature and molecular weight significantly influenced these deviations. Temperature-dependent correlations were developed for density, viscosity, and excess volumes, providing valuable insights for industrial applications.
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Neerup et al. (2025) studied this question.
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