Isothermal kinetics and thermal degradation of an aryl azo dye-containing polynorbornene
| Autor: | Shaya Y. Al-Raqa, A.A. Joraid, Paul R. Shipley, Patrick O. Shipman, S.N. Alamri, Alaa S. Abd-El-Aziz, A.A. Abu-Sehly |
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| Rok vydání: | 2011 |
| Předmět: |
Chemistry
Aryl Kinetics Activation energy Atmospheric temperature range Condensed Matter Physics Isothermal process chemistry.chemical_compound Differential scanning calorimetry Chemical engineering Polymer chemistry Degradation (geology) Physical and Theoretical Chemistry Thermal analysis Instrumentation |
| Zdroj: | Thermochimica Acta. 515:38-42 |
| ISSN: | 0040-6031 |
| Popis: | The kinetics involved in the thermal degradation of an aryl azo dye-containing polynorbornene was investigated by using isothermal DSC data. The activation energy of the degradation was found to be temperature dependent with two different values of 140 ± 5 and 21 ± 2 kJ mol −1 , and the Avrami exponent was observed to increase from 2 to 4 in the temperature range 573–608 K. The degradation mechanism follows the Avrami–Erofeev mechanism for solid state reaction models and it changes from A2 toward A4 for the same temperature range. |
| Databáze: | OpenAIRE |
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