1.1 This test method describes the model-free determination of Arrhenius activation energy by thermogravimetry using the factor jump (1)2 or modulated thermogravimetry (2) techniques. With the assumption of a first-order kinetic model, the pre-exponential factor is additionally determined. 1.2 This test method is generally applicable to materials with well-defined decomposition profiles, namely, a smooth, continuous mass change. 1.3 This test method is generally applicable to decomposition occurring in the range from 400 to 1200K (nominally 100 to 900C). The temperature range may be extended depending on the instrumentation and material used. 1.4 SI units are the standard. 1.5 There is no ISO standard similar to this test method. 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.
Requested by materials suppliers to assist in accelerated lifetime testing.
Keywordsactivation energy; decomposition; kinetics; pre-exponential factor; thermogravimetric analysis; thermogravimetry
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Ballot Item Approved as E2958-2014 and Pending Publication