ASTM E1641 - 13

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

    Active Standard ASTM E1641 | Developed by Subcommittee: E37.01

    Book of Standards Volume: 14.02


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    Significance and Use

    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 Test Method E1877 provided that a relationship has been established between the thermal endurance test results and actual lifetime tests.

    1. Scope

    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 kineticsusing the Ozawa/Flynn/Wall isoconversional method (1).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 to 1300K (nominally 100 to 1000°C). The temperature range may be extended depending on the instrumentation used.

    1.4 This method is similar to ISO 11358-2 but differs in its mathematical treatment.

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

    1.6 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 and health practices and determine the applicability of regulatory limitations prior to use.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    E473 Terminology Relating to Thermal Analysis and Rheology

    E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

    E1142 Terminology Relating to Thermophysical Properties

    E1582 Practice for Calibration of Temperature Scale for Thermogravimetry

    E1877 Practice for Calculating Thermal Endurance of Materials from Thermogravimetric Decomposition Data

    E1970 Practice for Statistical Treatment of Thermoanalytical Data

    E2040 Test Method for Mass Scale Calibration of Thermogravimetric Analyzers

    Other Standard


    ICS Code

    ICS Number Code 71.040.40 (Chemical analysis)

    UNSPSC Code

    UNSPSC Code


    Referencing This Standard

    DOI: 10.1520/E1641

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM E1641-13, Standard Test Method for Decomposition Kinetics by Thermogravimetry Using the Ozawa/Flynn/Wall Method, ASTM International, West Conshohocken, PA, 2013, www.astm.org

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