Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 75: Issue 2
Kinetic study of dipivaloylmethane by ozawa method
Authors:
J. Santos Universidade Federal da Paraíba Departamento de Química, CCEN, Campus I 58059-900 Joăo Pessoa Paraíba Brazil 58059-900 Joăo Pessoa Paraíba Brazil

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M. Conceiçăo Universidade Federal da Paraíba Departamento de Química, CCEN, Campus I 58059-900 Joăo Pessoa Paraíba Brazil 58059-900 Joăo Pessoa Paraíba Brazil

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M. Trindade Universidade Federal da Paraíba Departamento de Química, CCEN, Campus I 58059-900 Joăo Pessoa Paraíba Brazil 58059-900 Joăo Pessoa Paraíba Brazil

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A. Araújo Universidade Federal do Rio Grande Norte Departamento de Química, CCEN Natal RN Brazil Natal RN Brazil

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V. Fernandes Universidade Federal do Rio Grande Norte Departamento de Química, CCEN Natal RN Brazil Natal RN Brazil

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A. Souza Universidade Federal da Paraíba Departamento de Química, CCEN, Campus I 58059-900 Joăo Pessoa Paraíba Brazil 58059-900 Joăo Pessoa Paraíba Brazil

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Pages:
591–597
Online Publication Date:
02 Nov 2004
Publication Date:
01 Feb 2004
Article Category:
Research Article
DOI:
https://doi.org/10.1023/b:jtan.0000027150.30994.48
Keywords:
Ozawa; kinetic; dipivaloylmethane
Restricted access

Abstract  

The lanthanidic complexes of general formula Ln(C11H19O2)3 were synthesized and characterized by elementary analysis, infrared absorption espectroscopy, thermogravimetry (TG) and differential scanning calorimetry (DSC). The reaction of thermal decomposition of complexes has been studied by non-isothermal and isothermal TG. The thermal decomposition reaction of complexes began in the solid phase for Tb(thd)3, Tm(thd)3 and Yb(thd)3 and in the liquid phase for Er(thd)3 and Lu(thd)3, as it was observed by TG/DTG/DSC superimposed curves. The kinetic model that best adjusted the experimental isothermal thermogravimetric data was the R1 model. Through the Ozawa method it was possible to find coherent results in the kinetic parameters and according to the activation energy the following stability order was obtained: Tb(thd)3>Lu(thd)3>Yb(thd)3>Tm(thd)3>Er(thd)3

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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