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Estimation of Activation Energies for Thermooxidative Degradations of LDPE and NBR from Non-Isothermal and Isothermal DTA Data

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Abstract

Results obtained on the thermooxidative degradations of LDPE (low-density polyethylene) and NBR (nitrile-butadiene rubber) are presented. The activation energies for the thermooxidations leading to solid products were estimated. For LDPE, the activation energies obtained from non-isothermal data are in satisfactory agreement with those obtained from isothermal data. For NBR, the isothermal activation energy is ≉16% higher than the non-isothermal one. This difference is due to the morphological changes undergone by NBR during its heating at the rather high temperatures at which isothermal measurements were performed.

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Authors and Affiliations

  1. EUROTEST -S.A., Splaiul Unirii, Nr. 313, 73204, Bucharest, sector 3, P.O. Box 4-77

    P. Budrugeac

  2. Department of Physical Chemistry, Faculty of Chemistry, University of Bucharest, Bd. Republicii Nr. 13, Bucharest, Romania

    E. Segal

Authors
  1. P. Budrugeac
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  2. E. Segal
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Budrugeac, P., Segal, E. Estimation of Activation Energies for Thermooxidative Degradations of LDPE and NBR from Non-Isothermal and Isothermal DTA Data. Journal of Thermal Analysis and Calorimetry 54, 765–773 (1998). https://doi.org/10.1023/A:1010135702511

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  • DOI: https://doi.org/10.1023/A:1010135702511

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