Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 67: Issue 2
Some Aspects About Kinetics of Isothermal Degradation of Layered Hydrous Titanate Intercalated with n-Alkyldiamines
Authors:
L. Magalhães Nunes Universidade Federal da Paraíba Departamento de Química, CCEN 58059-900 João Pessoa, Paraíba Brazil 58059-900 João Pessoa, Paraíba Brazil

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and
A. Souza Universidade Federal da Paraíba Departamento de Química, CCEN 58059-900 João Pessoa, Paraíba Brazil 58059-900 João Pessoa, Paraíba Brazil

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Pages:
365–371
Online Publication Date:
01 Nov 2004
Publication Date:
01 Feb 2002
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1013923132334
Keywords:
intercalation; kinetics; thermogravimetry
Restricted access

Abstract  

Thermogravimetric data were used to calculate the kinetics of isothermal degradation of layered tetratitanate intercalated with n-alkyldiamines H2N(CH2)nNH2 (n=2, 3, 4, 6 or 8). The hydrous matrix showed two mass loss steps from the thermogravimetric curve, corresponding to the release of physisorbed and lattice water molecules. For the intercalated matrices a third mass loss was observed due to the release of organic moiety. From these values, the amine intercalated matrices can be ordered in the following sequence of thermal stability; C4>C2>C3≅C6>C8. Kinetic studies were carried out to the release of lattice water molecules. The kinetic model that best adjusted the experimental isothermal TG data was the diffusion mechanism controlling process.

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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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