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ASTM E1641-23

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Standard Test Method for Decomposition Kinetics by Thermogravimetry Using the Ozawa/Flynn/Wall Method

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1.1 This test method describes the determination of the kinetic parameters, Arrhenius activation energy, and pre-exponential factor by thermogravimetry, based on the assumption that the decomposition obeys first-order kinetics using the Ozawa/Flynn/Wall isoconversional method (1, 2).2

1.2 This test method is generally applicable to materials with well-defined decomposition profiles, namely, a smooth, continuous mass change with a single maximum rate.

1.3 This test method is normally applicable to decomposition occurring in the range from 400 K to 1300 K (nominally 100 °C to 1000 °C). The temperature range may be extended depending on the instrumentation used.

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


5.1 Thermogravimetry provides a rapid method for determining the temperature-decomposition profile of a material.

5.2 This test method can be used for estimating lifetimes of materials, using Practice E1877 provided that a relationship has been established between the thermal endurance test results and actual lifetime tests.

SDO ASTM: ASTM International
Document Number E1641
Publication Date Aug. 1, 2023
Language en - English
Page Count 7
Revision Level 23
Supercedes
Committee E37.01
Publish Date Document Id Type View
Aug. 1, 2023 E1641-23 Revision
Nov. 1, 2018 E1641-18 Revision
Feb. 15, 2016 E1641-16 Revision
March 1, 2015 E1641-15 Revision
Aug. 1, 2013 E1641-13 Revision
March 1, 2007 E1641-07 Revision
Oct. 1, 2004 E1641-04 Revision
Dec. 10, 1999 E1641-99 Revision
Sept. 1, 2012 E1641-07R12 Reaffirmation