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Open AccessJournal ArticleDOI

A New Method of Analyzing Thermogravimetric Data

Takeo Ozawa
- 01 Nov 1965 - 
- Vol. 38, Iss: 11, pp 1881-1886
TLDR
In this paper, a new method of obtaining the kinetic parameters from thermogravimetric curves has been proposed, which is simple and applicable to reactions which can not be analyzed by other methods.
Abstract
A new method of obtaining the kinetic parameters from thermogravimetric curves has been proposed. The method is simple and applicable to reactions which can not be analyzed by other methods. The effect of the heating rate on thermogravimetric curves has been elucidated, and the master curve of the experimental curves at different heating rates has been derived. The applications of the method to the pyrolyses of calcium oxalate and nylon 6 have been shown ; the results are in good agreement with the reported values. The applicability of the method to other types of thermal analyses has been discussed, and the method of the conversion of the data to other conditions of temperature change has been suggested. From these discussions, the definition of the thermal stability of materials has been criticized.

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Citations
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Journal ArticleDOI

Determination of pre-exponential factors and of the mathematical functions f(α) or G(α) that describe the reaction mechanism in a model-free way

TL;DR: Two methods were presented for the model-free computation of the pre-exponential factor dependency using kinetic compensation parameters and isoconversional methods, which give accurate results for both single and multi-step kinetics.
Journal ArticleDOI

Epoxy/POSS organic–inorganic hybrids: ATR-FTIR and DSC studies

TL;DR: In this article, an organic-inorganic hybrid nanocomposites were prepared by reaction of an octaepoxy-silsesquioxane, OECh, with an epoxy-amine system.
Journal ArticleDOI

Nanoconfinement Revealed in Degradation and Relaxation Studies of Two Structurally Different Polystyrene−Clay Systems

TL;DR: Heat capacity measurements have been employed to evaluate the size of the cooperatively rearranging region, VCRR, that is found to be structure dependent, and compared to its value in virgin PS, V CRR has markedly increased in the exfoliated PS-clay brush system but remained practically unchanged in the intercalated PS-Clay system.
Journal ArticleDOI

Effect of torrefaction on pinewood pyrolysis kinetics and thermal behavior using thermogravimetric analysis.

TL;DR: The results showed that the content of hemicellulose in biomass decreased while cellulose and lignin increased after torrefaction, and the C-O peaks of torrefied biomass was strengthened in FTIR spectrum and the crystallinity degree was enhanced according to XRD analysis.
Journal ArticleDOI

PAN precursor fabrication, applications and thermal stabilization process in carbon fiber production: Experimental and mathematical modelling

TL;DR: A comprehensive review of PAN fiber structure, properties, and its stabilization process along with the use of mathematical modelling as a powerful tool in prediction and optimization of the processes involved is presented in this article.
References
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Journal ArticleDOI

Kinetic Parameters from Thermogravimetric Data

A. W. Coats, +1 more
- 01 Jan 1964 - 
TL;DR: In this article, a thermocouple is used to measure the sample temperature in a Stanton HT-D thermobalance, the bead of which is positioned in or near the sample, depending on crucible design.
Journal ArticleDOI

Kinetic analysis of thermogravimetric data

TL;DR: The kinetic analysis of the thermogram, by use of either its exact equation or a more convenient approximation formula, is straightforward in cases of volatilization via simple kinetics as mentioned in this paper.
Journal ArticleDOI

Estimating isothermal life from thermogravimetric data

TL;DR: In this paper, the authors presented a method for estimating equivalent isothermal life from thermogravimetric data and for estimating the apparent activation energy for volatilization even though the nature of the kinetic process is unknown.
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