1.1 This test method describes the determination of the kinetic parameters, Arrhenius activation energy, and preexponential 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.
ASTM E1641-18 Referenced Document
ASTM E1142 Standard Terminology Relating to Thermophysical Properties
ASTM E1582 Standard Practice for Calibration of Temperature Scale for Thermogravimetry
ASTM E1877 Standard Practice for Calculating Thermal Endurance of Materials from Thermogravimetric Decomposition Data*, 2021-03-01 Update
ASTM E1970 Standard Practice for Statistical Treatment of Thermoanalytical Data*, 2023-01-01 Update
ASTM E2040 Standard Test Method for Mass Scale Calibration of Thermogravimetric Analyzers
ASTM E29 Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
ASTM E473 Standard Terminology Relating to Thermal Analysis
ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ISO 11358-2 Plastics - Thermogravimetry (TG) of polymers - Part 2: Determination of activation energy*, 2020-12-31 Update
ASTM E1641-18 history
2023ASTM E1641-23 Standard Test Method for Decomposition Kinetics by Thermogravimetry Using the Ozawa/Flynn/Wall Method
2018ASTM E1641-18 Standard Test Method for Decomposition Kinetics by Thermogravimetry Using the Ozawa/Flynn/Wall Method
2016ASTM E1641-16 Standard Test Method for Decomposition Kinetics by Thermogravimetry Using the Ozawa/Flynn/Wall Method
2015ASTM E1641-15 Standard Test Method for Decomposition Kinetics by Thermogravimetry Using the Ozawa/Flynn/Wall Method
2013ASTM E1641-13 Standard Test Method for Decomposition Kinetics by Thermogravimetry Using the Ozawa/Flynn/Wall Method
2007ASTM E1641-07(2012) Standard Test Method for Decomposition Kinetics by Thermogravimetry
2007ASTM E1641-07 Standard Test Method for Decomposition Kinetics by Thermogravimetry
2004ASTM E1641-04 Standard Test Method for Decomposition Kinetics by Thermogravimetry
1999ASTM E1641-99 Standard Test Method for Decomposition Kinetics by Thermogravimetry