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Phase Diagram of the Ethylene Glycol–Dimethylsulfoxide System

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Abstract

The phase diagram of ethylene glycol (EG)–dimethylsulfoxide (DMSO) system is studied in the temperature range of +25 to −140°C via differential scanning calorimetry. It is established that the EG–DMSO system is characterized by strong overcooling of the liquid phase, a glass transition at −125°C, and the formation of a compound with the composition of DMSO · 2EG. This composition has a melting temperature of −60°C, which is close to those of neighboring eutectics (−75 and −70°C). A drop in the baseline was observed in the temperature range of 8 to −5°C at DMSO concentrations of 5–50 mol %, indicating the existence of a phase separation area in the investigated system. The obtained data is compared to the literature data on the H2O–DMSO phase diagram.

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Authors and Affiliations

  1. Kurnakov Institute of General and Inorganic Chemistry, Moscow, 119991, Russia

    I. A. Solonina, M. N. Rodnikova, A. V. Khoroshilov & E. V. Shirokova

  2. Frumkin Institute of Physical Chemistry and Electrochemistry, Moscow, 119071, Russia

    M. R. Kiselev

Authors
  1. I. A. Solonina
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  2. M. N. Rodnikova
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  3. M. R. Kiselev
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  4. A. V. Khoroshilov
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  5. E. V. Shirokova
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Corresponding author

Correspondence to M. N. Rodnikova.

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Original Russian Text © I.A. Solonina, M.N. Rodnikova, M.R. Kiselev, A.V. Khoroshilov, E.V. Shirokova, 2018, published in Zhurnal Fizicheskoi Khimii, 2018, Vol. 92, No. 5, pp. 751–754.

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Solonina, I.A., Rodnikova, M.N., Kiselev, M.R. et al. Phase Diagram of the Ethylene Glycol–Dimethylsulfoxide System. Russ. J. Phys. Chem. 92, 918–921 (2018). https://doi.org/10.1134/S0036024418050291

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  • DOI: https://doi.org/10.1134/S0036024418050291

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