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Kissinger Method in Kinetics of Materials: Things to Beware and Be Aware of

Molecules (Basel, Switzerland), 2020-06, Vol.25 (12), p.2813 [Peer Reviewed Journal]

2020. This work is licensed under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;2020 by the author. 2020 ;ISSN: 1420-3049 ;EISSN: 1420-3049 ;DOI: 10.3390/molecules25122813 ;PMID: 32570880

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Title:
Kissinger Method in Kinetics of Materials: Things to Beware and Be Aware of
Author: Vyazovkin, Sergey
Subjects: Activation energy ; Calorimetry ; Calorimetry, Differential Scanning ; Chemical reactions ; Cold Temperature ; crosslinking polymerization (curing) ; Crystallization ; decomposition ; degradation ; Differential scanning calorimetry ; Differential thermal analysis ; Energy ; Glass transition ; Heat ; Heating ; Hot Temperature ; Kinetics ; liquid and solid state ; Phase Transition ; phase transitions ; Reaction kinetics ; Review ; Temperature ; Thermal analysis ; Thermogravimetric analysis ; Thermogravimetry
Is Part Of: Molecules (Basel, Switzerland), 2020-06, Vol.25 (12), p.2813
Description: The Kissinger method is an overwhelmingly popular way of estimating the activation energy of thermally stimulated processes studied by differential scanning calorimetry (DSC), differential thermal analysis (DTA), and derivative thermogravimetry (DTG). The simplicity of its use is offset considerably by the number of problems that result from underlying assumptions. The assumption of a first-order reaction introduces a certain evaluation error that may become very large when applying temperature programs other than linear heating. The assumption of heating is embedded in the final equation that makes the method inapplicable to any data obtained on cooling. The method yields a single activation energy in agreement with the assumption of single-step kinetics that creates a problem with the majority of applications. This is illustrated by applying the Kissinger method to some chemical reactions, crystallization, glass transition, and melting. In the cases when the isoconversional activation energy varies significantly, the Kissinger plots tend to be almost perfectly linear that means the method fails to detect the inherent complexity of the processes. It is stressed that the Kissinger method is never the best choice when one is looking for insights into the processes kinetics. Comparably simple isoconversional methods offer an insightful alternative.
Publisher: Switzerland: MDPI AG
Language: English
Identifier: ISSN: 1420-3049
EISSN: 1420-3049
DOI: 10.3390/molecules25122813
PMID: 32570880
Source: GFMER Free Medical Journals
MEDLINE
PubMed Central
Directory of Open Access Journals
Alma/SFX Local Collection
ProQuest Central

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Kissinger Method in Kinetics of Materials: Things to Beware and Be Aware of

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