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Description of the shape of thermoanalytical curves

  • Papers Presented at the Seminar on Modern Application of Thermal Analysis
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Abstract

Empirical parameters were chosen for the characterization of peaks (or steps) of thermoanalytical curves. The parameters were applied in studies on the repeatability, the relationship between kinetic constants and peak shape, the effect of sample thermal resistance. Kinetic constants can be estimated on the basis of peak shape parameters. Besides, approximate criteria were formulated for experiments allowing kinetic evaluation with the neglect of the heat transport within the sample. The empirical parameters were also used in checking the suitability of DSC data for purity analysis and in detecting changes of the thermal decomposition of papers caused by ageing.

Zusammenfassung

Zur Beschreibung von Peaks bzw. Stufen thermoanalytischer Kurven wurden emperische Parameter ermittelt, die bei der Untersuchung der Reproduziertbarkeit, der Beziehung zwischen kinetischen Konstanten und Peakform so wie des Einflusses des thermischen Wiederstandes der Probe angewendet wurden. Kinetische Konstanten können auf der Basis von Peakformparametern geschÄtzt werden. Weiterhin wurden Kriterien für Experimente ermittelt, die eine kinetische NÄherungslösung unter VernachlÄssigung des WÄrmetransportes innerhalb der Probe ermöglichen. Die empirischen Parameter wurden au\erdem bei der Untersuchung der Eignung von DSC-daten zur Reinheitsanalyse angewendet, weiterhin zum Nachweis von alterungsbedingten Änderungen der thermischen Zerzetzung von Papier.

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Author information

Authors and Affiliations

  1. Institute for General and Analytical Chemistry, Technical University of Budapest, 1521, Budapest, Hungary

    G. Pokol, J. Madarász, T. Kocsis & S. Gál

  2. Ministry of the Interior, P.O.B. 314/32, 1903, Budapest, Hungary

    F. Hevesi Tóth

  3. G. Richter Chemical Works, P.O.B. 27, 1475, Budapest, Hungary

    I. Péter

Authors
  1. G. Pokol
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  2. F. Hevesi Tóth
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  3. I. Péter
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  4. J. Madarász
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  5. T. Kocsis
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  6. S. Gál
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Additional information

The authors express their thanks to Mrs E. Tóth for her valuable technical help. The permission to reproduce Figs 2–6 and 8–10 from Analytica Chimica Acta and Thermochimica Acta (Elsevier, Amsterdam) is also acknowledged.

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Pokol, G., Tóth, F.H., Péter, I. et al. Description of the shape of thermoanalytical curves. Journal of Thermal Analysis 36, 1867–1888 (1990). https://doi.org/10.1007/BF01913434

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