Low-Temperature Phase Equilibria in an Ethylene Glycol–Acetone System

I. A. Solonina; Солонина И. А.; S. V. Makaev; Макаев С. В.; M. N. Rodnikova; Родникова М. Н.; M. R. Kiselev; Киселев М. Р.; A. V. Khoroshilov; Хорошилов А. В.

doi:10.31857/S0044453723020267

Low-Temperature Phase Equilibria in an Ethylene Glycol–Acetone System

Authors: Solonina I.A.¹, Makaev S.V.², Rodnikova M.N.¹, Kiselev M.R.³, Khoroshilov A.V.¹
Affiliations:
1. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences
2. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences
3. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Issue: Vol 97, No 2 (2023)
Pages: 210-215
Section: CHEMICAL THERMODYNAMICS AND THERMOCHEMISTRY
Submitted: 15.10.2023
Published: 01.02.2023
URL: https://journals.rcsi.science/0044-4537/article/view/136507
DOI: https://doi.org/10.31857/S0044453723020267
EDN: https://elibrary.ru/ELRSMN
ID: 136507

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Abstract

An ethylene glycol (EG)–acetone (AC) system is studied via differential scanning calorimetry in the −140 to +40°С range of temperatures. A phase diagram is plotted over the range of concentrations. It is found that the mixtures in the system are supercooled by more than 30°C. Low-temperature melting is recorded in the region around −98°C, which corresponds to the eutectic point temperature. The devitrification of rapidly cooled samples is observed in the range of concentrations up to ~21 mol % AC, and the temperature of devitrification is determined (Tg ~ −120°C). The plotted phase diagram of the EG–AC system is compared to a water–acetone phase diagram.

Keywords

differential scanning calorimetry, low-temperature melting, devitrification temperature rapidly, cooled samples

References

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