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New pressure DSC cell and some applications

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Abstract

Physical properties and chemical reactions can be investigated by pressure DSC. There are 3 possibilities of sample preparation with respect to the contact with the furnace atmosphere which are illustrated by typical applications:

  1. 1.

    Free access of furnace atmosphere

  2. 2.

    Sealed crucible (constant volume)

  3. 3.

    Limited access of furnace atmosphere (self generated atmosphere)

With water as the most important volatile solvent it is shown how evaporation and vaporization can be controlled by different contact between sample and furnace atmosphere.

An appropriate computer simulation helps to understand evaporation and vaporization of volatiles at various conditions.

Zusammenfassung

Mittels Druck-DSC können physikalische Eigenschaften und chemische Reaktionen untersucht werden. Hinsichtlich des Kontaktes mit der Ofenatmosphäre gibt es drei Möglichkeiten zur Probenvorbereitung:

  1. 1.

    Freier Zutritt der Ofenatmosphäre

  2. 2.

    Verschlossener Tiegel (konstantes Volumen)

  3. 3.

    Begrenzter Zugang der Ofenatmosphäre (eigengenerierte Atmosphäre)

Mit Wasser als wichtigstem flüchtigen Lösungsmittel wird gezeigt, wie Verdampfen und Verdunsten durch den verschiedenen Kontakt zwischen Probe und Ofenatmosphäre kontrolliert werden kann.

Eine entsprechende Computersimulation hilft, Verdampfen und Verdunsten von flüchtigen Substanzen bei verschiedenen Bedingungen besser zu verstehen.

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References

  1. B. B. Bird, W. E. Stewart and E. N. Lightfoot, Transport Phenomena, Wiley, 1960, pp. 505, 523.

  2. Handbook of CHEMISTRY and PHYSICS, 61st Edition 1980–1981, CRC Press Inc., pp. D196–197.

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Perrenot, B., de Vallière, P. & Widmann, G. New pressure DSC cell and some applications. Journal of Thermal Analysis 38, 381–390 (1992). https://doi.org/10.1007/BF01915502

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  • DOI: https://doi.org/10.1007/BF01915502

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