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ASTM E1641-04

(Test Method)

Standard Test Method for Decomposition Kinetics by Thermogravimetry

Standard Test Method for Decomposition Kinetics by Thermogravimetry

SCOPE
1.1 This test method covers 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.
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
30-Sep-2004
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 E1641-99 - Standard Test Method for Decomposition Kinetics by Thermogravimetry
Effective Date
01-Oct-2004
Replaced By
ASTM E1641-07 - Standard Test Method for Decomposition Kinetics by Thermogravimetry
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-Oct-2004
Referred By
ASTM E2958-21 - Standard Test Methods for Kinetic Parameters by Factor Jump/Modulated Thermogravimetry
Effective Date
01-Oct-2004
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-Oct-2004
Referred By
ASTM E1877-21 - Standard Practice for Calculating Thermal Endurance of Materials from Thermogravimetric Decomposition Data
Effective Date
01-Oct-2004
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-Oct-2004

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ASTM E1641-04 - Standard Test Method for Decomposition Kinetics by ThermogravimetryASTM E1641-04 - Standard Test Method for Decomposition Kinetics by Thermogravimetry
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ASTM E1641-04 - Standard Test Method for Decomposition Kinetics by Thermogravimetry
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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:E 1641–04
Standard Test Method for
1
Decomposition Kinetics by Thermogravimetry
This standard is issued under the fixed designation E 1641; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope terials From Thermogravimetric Decomposition Data
3
2.2 Other Standard:
1.1 This test method covers determination of the kinetic
ISO)11358–2Plastics Thermogravimetry(TG)ofPolymers
parameters, Arrhenius activation energy, and preexponential
Part 2: Determination of Kinetic Parameters
factor by thermogravimetry, based on the assumption that the
decomposition obeys first-order kinetics.
3. Terminology
1.2 This test method is generally applicable to materials
3.1 Technical terms used in this test method are defined in
with well-defined decomposition profiles, namely, a smooth,
Terminologies E473 and E1142.
continuous mass change with a single maximum rate.
1.3 This test method is normally applicable to decomposi-
4. Summary of Test Method
tion occurring in the range from 400 to 1300K (100 to 1000
4.1 This test method consists of heating a series of four or
°C).The temperature range may be extended depending on the
more test specimens, taken from the original sample, each at a
instrumentation used.
different heating rate between 1 and 10 K/min, through their
1.4 Computer or electronic-based instruments, techniques,
decompositionregion.Thespecimenmassisrecordedcontinu-
or data treatment equivalent to this test method may also be
ously as a function of temperature. The temperatures for
used.
constant conversion are determined from the resultant mass
NOTE 1—Users of this test method are expressly advised that all such
losscurves.TheArrheniusactivationenergyisthendetermined
instrumentsortechniquesmaynotbeequivalent.Itistheresponsibilityof
from a plot of the logarithm of heating rate versus the
the user of this test method to determine the necessary equivalency prior
reciprocal of the absolute temperature at constant conversion
to use.
level. This activation energy may then be used to calculate
1.5 SI units are the standard.
thermal endurance and an estimate of the lifetime of the
1.6 This method is similar to ISO 11358–2 but differs in its
material at a certain temperature using Test Method E1877.
mathematical treatment.
1.7 This standard does not purport to address all of the 5. Significance and Use
safety concerns, if any, associated with its use. It is the
5.1 Thermogravimetry provides a rapid method for deter-
responsibility of the user of this standard to establish appro-
mining the temperature-decomposition profile of a material.
priate safety and health practices and determine the applica-
5.2 This test method can be used for estimating lifetimes of
bility of regulatory limitations prior to use.
materials, using Test Method E1877 provided that a relation-
ship has been established between the thermal endurance test
2. Referenced Documents
results and actual lifetime tests.
2
2.1 ASTM Standards:
E473 Terminology Relating to Thermal Analysis 6. Apparatus
E1142 TerminologyRelatingtoThermophysicalProperties
6.1 The essential equipment required to provide the mini-
E1582 Practice for Calibration of Temperature Scale for
mum thermogravimetric analytical capability of this test
Thermogravimetry
method includes:
E1877 Practice for Calculating Thermal Endurance of Ma-
6.1.1 A thermobalance, composed of (a)a furnace to
provide uniform controlled heating of a specimen at a constant
rate within the temperature range from ambient to 1300 K; (b)
1
ThistestmethodisunderthejurisdictionofASTMCommitteeE37onThermal
a temperature sensor to provide an indication of the specimen/
Measurements and is the direct responsibility of Subcommittee E37.01 on Test
furnace temperature to 60.1 K; (c)an electrobalance to
Methods.
continuously measure the specimen mass with a minimum
Current edition approved Oct. 1, 2004. Published November 2004. Originally
approved in 1994. Last previous edition approved in 1999 as E1641–99.
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 fromAvailable fromAmerican National Standards Institute (ANSI),
the ASTM website. 25 W. 43rd St., 4th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
E 1641–04
capacityof20mgandasensitivityof 650µg;and(d)ameans 8.2 In the absenc
...

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