Logistic mixture model versus Arrhenius for kinetic study of material degradation by dynamic thermogravimetric analysis

Autor:	Ignacio López de Ullibarri, Ana García, Fernando Barbadillo, Ricardo Cao, Ramón Artiaga, Salvador Naya
Rok vydání:	2006
Předmět:	Arrhenius equation Thermogravimetric analysis Work (thermodynamics) Chemistry Applied Mathematics Analytical chemistry Thermodynamics Mixture model Kinetic energy Logistic regression Analytical Chemistry Chemometrics Thermogravimetry symbols.namesake symbols
Zdroj:	Journal of Chemometrics. 20:158-163
ISSN:	1099-128X 0886-9383
DOI:	10.1002/cem.1023
Popis:	In this work, an alternative method to the Arrhenius equation for thermogravimetric analysis (TGA) is presented. It is based in performing a logistic regression of the raw TGA data. This model assumes that more than one physical process may be involved in each mass loss step and that each physical process may extend along all the experiment. The logistic mixture obtained explains the complete TGA trace, including as many mass loss steps as the experiment has. The typical asymptotic tendency of the mass loss steps is perfectly reproduced by the model. A discussion of the model from the statistical point of view is presented as well as a comparison with other classical models. Copyright © 2007 John Wiley & Sons, Ltd.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::44c664258ba975f075b6a4ffa837ece4 https://doi.org/10.1002/cem.1023 Zobrazit plný text záznamu Plný text