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Publication detail

Kissinger equation versus glass transition phenomenology
Year: 2013
Type of publication: článek v odborném periodiku
Name of source: Journal of Thermal Analysis and Calorimetry
Publisher name: Springer
Page from-to: 285-293
Titles:
Language Name Abstract Keywords
cze Kissingerova rovnice versus fenomenologie skelného přechodu Aplikovatelnost Kissingerovy rovnice pro stanovení zdánlivé aktivační energie odpovídající kinetice skelného přechodu byla testována. Teoreticky simulovaná data založená na běžně akceptovaném TNM modelu byla použita jako reprezentativní data strukturně relaxačního chování. Hodnoty zdánlivé aktivační energie byly získány a porovnány s původními hodnotami. kinetika skelného přechodu; TNM model; Kissingerova rovnice
eng Kissinger equation versus glass transition phenomenology The applicability of the Kissinger equation for the evaluation of apparent activation energy corresponding to glass transition kinetics is examined. Theoretically simulated data based on the generally accepted Tool-Narayanaswamy-Moynihan model were used to represent relevant cases of structural relaxation behavior. The values of the apparent activation energy determined by the Kissinger equation were, despite the linearity of the dependencies, in major disagreement with the original values of a dagger h (*) used for the simulation of the source data. Furthermore, a large dependence of the a dagger h (Kis) (*) evaluation (performed using the Kissinger equation) on the thermal history of the glass was found. The latter represents an unacceptable systematic error in the methodology, implying the incorrectness of the Kissinger equation usage for the evaluation of "glass transition activation energy". This study addresses the currently widespread (incorrect) usage of the Kissinger equation for the above-mentioned purpose. glass transition kinetics; TNM model; Kissinger equation

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