A rapid method for approximative evaluation of thermooxidative stability of organic materials

In this work, a novel procedure for fast assessment of the material residual stability is proposed. The method resides in integral isoconversional kinetic analysis of the thermal oxidation of unaged material employing the Berthelot–Hood temperature function. Subsequently, the obtained conversion-ind...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2022-11, Vol.147 (22), p.12489-12494
Main Authors: Vykydalová, Anna, Cibulková, Zuzana, Dubaj, Tibor, Šimon, Peter
Format: Article
Language:English
Subjects:
Analysis
Analytical Chemistry
Chemistry
Chemistry and Materials Science
Conversion
Inorganic Chemistry
Low density polyethylenes
Mathematical analysis
Measurement Science and Instrumentation
Methods
Organic materials
Oxidation
Parameters
Physical Chemistry
Polymer Sciences
Radiation
Stability analysis
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Summary:In this work, a novel procedure for fast assessment of the material residual stability is proposed. The method resides in integral isoconversional kinetic analysis of the thermal oxidation of unaged material employing the Berthelot–Hood temperature function. Subsequently, the obtained conversion-independent kinetic parameter D is also employed for samples aged in various regimes. The value of conversion-dependent parameter A for aged samples is calculated from the oxidation onset temperature measured at 5 °C min −1 . The residual stabilities are then calculated as a simple ratio of the parameter A of aged material to that of the unaged one. The method has been applied and verified for the samples of low-density polyethylene aged by thermal, radiation and combined ageing. The method can also be employed for high-throughput screening of the effect of various stabilizers and antioxidants in a given organic matrix.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-022-11459-5