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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

Thermal decomposition kinetics of sorghum straw via thermogravimetric analysis.

TL;DR: The thermal decomposition of sorghum straw was investigated by non-isothermal thermogravimetric analysis, where the determination of kinetic triplet (activation energy, pre-exponential factor, and reaction model), was the key objective.
Journal ArticleDOI

Non-isothermal kinetics and generalized time

Takeo Ozawa
- 01 May 1986 - 
TL;DR: In this paper, the fundamental equations for non-isothermal kinetics of various processes are reviewed, and the usefulness of this concept of generalized times is discussed, and they are found to be useful for the systematic description of nonisothermal processes as well as for prediction and control.
Journal ArticleDOI

Advantages of Combined Kinetic Analysis of Experimental Data Obtained under Any Heating Profile

TL;DR: In this paper, the combined analysis of experimental data by means of the logarithmic expression of the general differential equation is used for the determination of the kinetic parameters of solid-state reactions.
Journal ArticleDOI

The thermal degradation kinetics of polypropylene : Part III. Thermogravimetric analyses

TL;DR: In this paper, the data were treated as a pseudo first-order reaction for the pyrolysis of polypropylene, and several previously published interpretation methods were applied to the data, but the wide temperature range used in this work (45-580 °C) encompassed a change in the decomposition mechanism and this greatly limited the utility of the methods.
Journal ArticleDOI

Critical investigation of methods for kinetic analysis of thermoanalytical data

TL;DR: In this paper, the methods of Freeman and Carroll (I), Coats and Redfern (II), Sharp and Wentworth (III), and the present author (IV) are applied to five theoretical thermoanalytical data calculated for assumed kinetic parameters at various heating rates.
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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