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ASTM E1641-07

(Test Method)

Standard Test Method for Decomposition Kinetics by Thermogravimetry

Standard Test Method for Decomposition Kinetics by Thermogravimetry

SIGNIFICANCE AND USE
Thermogravimetry provides a rapid method for determining the temperature-decomposition profile of a material.  
This test method can be used for estimating lifetimes of materials, using Test Method E 1877 provided that a relationship has been established between the thermal endurance test results and actual lifetime tests.
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 kinetics.
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 (100 to 1000 °C). The temperature range may be extended depending on the instrumentation used.
1.4 Computer or electronic-based instruments, techniques, or data treatment equivalent to this test method may also be used.
Note 1—Users of this test method are expressly advised that all such instruments or techniques may not be equivalent. It is the responsibility of the user of this test method to determine the necessary equivalency prior to use.
1.5 SI units are the standard.
1.6 This method is similar to ISO 11358-2 but differs in its mathematical treatment.
1.7 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.

General Information

Status
Historical
Publication Date
28-Feb-2007
ICS
71.040.40 - Chemical analysis
Technical Committee
E37 - Thermal Measurements
Drafting Committee
E37.01 - Calorimetry and Mass Loss
Current Stage
Ref Project

Relations

Replaces
ASTM E1641-04 - Standard Test Method for Decomposition Kinetics by Thermogravimetry
Effective Date
01-Mar-2007
Replaced By
ASTM E1641-07(2012) - Standard Test Method for Decomposition Kinetics by Thermogravimetry
Effective Date
01-Sep-2012
Referred By
ASTM E2958-21 - Standard Test Methods for Kinetic Parameters by Factor Jump/Modulated Thermogravimetry
Effective Date
01-Mar-2007
Referred By
ASTM E2781-16 - Standard Practice for Evaluation of Methods for Determination of Kinetic Parameters by Calorimetry and Differential Scanning Calorimetry
Effective Date
01-Mar-2007
Referred By
ASTM E3007-21 - Standard Practice for Selection and Use of Kinetic Reference Values in the Study of Decomposition Reactions by Thermogravimetry
Effective Date
01-Mar-2007
Referred By
ASTM E2041-23 - Standard Test Method for Estimating Kinetic Parameters by Differential Scanning Calorimeter Using the Borchardt and Daniels Method
Effective Date
01-Mar-2007
Referred By
ASTM E1877-21 - Standard Practice for Calculating Thermal Endurance of Materials from Thermogravimetric Decomposition Data
Effective Date
01-Mar-2007

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ASTM E1641-07 - Standard Test Method for Decomposition Kinetics by ThermogravimetryASTM E1641-07 - Standard Test Method for Decomposition Kinetics by Thermogravimetry
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ASTM E1641-07 - Standard Test Method for Decomposition Kinetics by Thermogravimetry
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E1641 − 07
Standard Test Method for
1
Decomposition Kinetics by Thermogravimetry
This standard is issued under the fixed designation E1641; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E473Terminology Relating to Thermal Analysis and Rhe-
ology
1.1 This test method describes the determination of the
E1142Terminology Relating to Thermophysical Properties
kinetic parameters, Arrhenius activation energy, and preexpo-
E1582Practice for Calibration of Temperature Scale for
nential factor by thermogravimetry, based on the assumption
Thermogravimetry
that the decomposition obeys first-order kinetics.
E1877Practice for Calculating Thermal Endurance of Ma-
1.2 This test method is generally applicable to materials
terials from Thermogravimetric Decomposition Data
3
with well-defined decomposition profiles, namely, a smooth,
2.2 Other Standard:
continuous mass change with a single maximum rate.
ISO11358–2 Plastics Thermogravimetry (TG) of Polymers
Part 2: Determination of Kinetic Parameters
1.3 This test method is normally applicable to decomposi-
tion occurring in the range from 400 to 1300K (100 to 1000
3. Terminology
°C).The temperature range may be extended depending on the
instrumentation used. 3.1 Technical terms used in this test method are defined in
Terminologies E473 and E1142.
1.4 Computer or electronic-based instruments, techniques,
or data treatment equivalent to this test method may also be
4. Summary of Test Method
used.
4.1 This test method consists of heating a series of four or
NOTE 1—Users of this test method are expressly advised that all such
more test specimens, taken from the original sample, each at a
instrumentsortechniquesmaynotbeequivalent.Itistheresponsibilityof
different heating rate between 1 and 10 K/min, through their
the user of this test method to determine the necessary equivalency prior
decompositionregion.Thespecimenmassisrecordedcontinu-
to use.
ously as a function of temperature. The temperatures for
1.5 The values stated in SI units are to be regarded as
constant conversion are determined from the resultant mass
standard. No other units of measurement are included in this
losscurves.TheArrheniusactivationenergyisthendetermined
standard.
from a plot of the logarithm of heating rate versus the
1.6 This method is similar to ISO11358–2 but differs in its
reciprocal of the absolute temperature at constant conversion
mathematical treatment.
level. This activation energy may then be used to calculate
thermal endurance and an estimate of the lifetime of the
1.7 This standard does not purport to address all of the
material at a certain temperature using Test Method E1877.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5. Significance and Use
priate safety and health practices and determine the applica-
5.1 Thermogravimetry provides a rapid method for deter-
bility of regulatory limitations prior to use.
mining the temperature-decomposition profile of a material.
2. Referenced Documents
5.2 This test method can be used for estimating lifetimes of
2
materials, using Test Method E1877 provided that a relation-
2.1 ASTM Standards:
ship has been established between the thermal endurance test
results and actual lifetime tests.
1
ThistestmethodisunderthejurisdictionofASTMCommitteeE37onThermal
6. Apparatus
Measurements and is the direct responsibility of Subcommittee E37.01 on Calo-
rimetry and Mass Loss.
6.1 The essential equipment required to provide the mini-
Current edition approved March 1, 2007. Published April 2007. Originally
mum thermogravimetric analytical capability of this test
approved in 1994. Last previous edition approved in 2004 as E1641–04. DOI:
10.1520/E1641-07.
method includes:
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E1641 − 07
NOTE 4—The specimen size and surface-to-volume ratio are known to
6.1.1 A thermobalance, composed of (a)a furnace to
affect the results of this test.Anarrow range of specimen sizes should be
provide uniform controlled heating of a specimen at a const
...

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