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ASTM E2550-07

(Test Method)

Standard Test Method for Thermal Stability by Thermogravimetry

Standard Test Method for Thermal Stability by Thermogravimetry

SCOPE
1.1 This test method covers the assessment of material thermal stability through the determination of the temperature at which the materials start to decompose or react and the extent of the mass change using thermogravimetry. The test method uses minimum quantities of material and is applicable over the temperature range from ambient to 800°C.
1.2 The absence of reaction or decomposition is used as an indication of thermal stability in this test method under the experimental conditions used.
1.3 This test method may be performed on solids or liquids, which do not sublime or vaporize in the temperature range of interest.
1.4 This test method shall not be used by itself to establish a safe operating or storage temperature. It may be used in conjunction with other test methods (for example, E 487, E 537 and E 1981) as part of a hazard analysis of a material.
1.5 This test method is normally applicable to reaction or decomposition occurring in the range from room temperature to 800 °C. The temperature range may be extended depending on the instrumentation used.
1.6 This test method may be performed in an inert, a reactive or self-generated atmosphere.
1.7 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.8 There is no ISO standard equivalent to this test method.
1.9 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. This standard may involve hazardous materials, operations, and equipment.

General Information

Status
Historical
Publication Date
28-Feb-2007
ICS
17.200.99 - Other standards related to thermodynamics
Technical Committee
E37 - Thermal Measurements
Drafting Committee
E37.01 - Calorimetry and Mass Loss
Current Stage
Ref Project

Relations

Replaced By
ASTM E2550-11 - Standard Test Method for Thermal Stability by Thermogravimetry
Effective Date
01-Apr-2011
Referred By
ASTM E2958-21 - Standard Test Methods for Kinetic Parameters by Factor Jump/Modulated Thermogravimetry
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 E2550-07 - Standard Test Method for Thermal Stability by ThermogravimetryASTM E2550-07 - Standard Test Method for Thermal Stability by Thermogravimetry
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ASTM E2550-07 - Standard Test Method for Thermal Stability 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:E2550–07
Standard Test Method for
1
Thermal Stability by Thermogravimetry
This standard is issued under the fixed designation E2550; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
1.1 This test method covers the assessment of material
bility of regulatory limitations prior to use. This standard may
thermal stability through the determination of the temperature
involve hazardous materials, operations, and equipment.
at which the materials start to decompose or react and the
extent of the mass change using thermogravimetry. The test
2. Referenced Documents
method uses minimum quantities of material and is applicable
2
2.1 ASTM Standards:
over the temperature range from ambient to 800°C.
E473 Terminology Relating to Thermal Analysis and Rhe-
1.2 The absence of reaction or decomposition is used as an
ology
indication of thermal stability in this test method under the
E487 Test Method for Constant-Temperature Stability of
experimental conditions used.
Chemical Materials
1.3 This test method may be performed on solids or liquids,
E537 Test Method for The Thermal Stability of Chemicals
which do not sublime or vaporize in the temperature range of
by Differential Scanning Calorimetry
interest.
E1142 Terminology Relating to Thermophysical Properties
1.4 This test method shall not be used by itself to establish
E1445 Terminology Relating to Hazard Potential of Chemi-
a safe operating or storage temperature. It may be used in
cals
conjunction with other test methods (for example, E487, E537
E1582 Practice for Calibration of Temperature Scale for
and E1981) as part of a hazard analysis of a material.
Thermogravimetry
1.5 This test method is normally applicable to reaction or
E1981 Guide for Assessing Thermal Stability of Materials
decomposition occurring in the range from room temperature
by Methods of Accelerating Rate Calorimetry
to 800 °C. The temperature range may be extended depending
E2040 Test Method for Mass Scale Calibration of Thermo-
on the instrumentation used.
gravimetric Analyzers
1.6 This test method may be performed in an inert, a
reactive or self-generated atmosphere.
3. Terminology
1.7 The values stated in SI units are to be regarded as
3.1 Definition:
standard. No other units of measurement are included in this
3.1.1 Specific technical terms used in this test method are
standard.
definedinTerminologiesE473,E1142andE1445.Theseterms
1.8 There is no ISO standard equivalent to this test method.
include thermogravimetry (TG), thermogravimetric analysis
1.9 This standard does not purport to address all of the
(TGA), thermal stability, onset temperature (T ), derivative,
o
safety concerns, if any, associated with its use. It is the
and TG curve.
1
ThistestmethodisunderthejurisdictionofASTMCommitteeE37onThermal
2
Measurements and is the direct responsibility of Subcommittee E37.01 on Calo- For referenced ASTM standards, visit the ASTM website, www.astm.org, or
rimetry and Mass Loss. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved March 1, 2007. Published April 2007. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
E2550-07. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
E2550–07
3.2 Definitions of Terms Specific to This Standard: testing. Alternatively, the sample can be tested as is, however,
3.2.1 DTG curve, n—aplotofthefirstderivativeofTGdata special caution is required during the data analysis. The mass
with respect to temperature or time. loss due to the loss of impurity should not interfere with the
3.2.2 mass change plateau, n—a region of the TG curve determination of reaction or decomposition temperature.
with a relatively constant mass; it is accompanied by a 5.5 The four significant criteria of this test method are: the
minimum in the DTG curve for a mass loss, or a maximum for detection of a sample mass change; the extent of the mass
a mass gain. change; the approximate temperature at which the event
occurs; the observance of effects due to the atmosphere.
4. Summary of Test Method
4.1 Asample of the material to be examined is placed in an 6. Limitations
inert container and then heated at a controlled rate of 1 to 20°C
6.1 Many environmental factors affect the existence, mag-
-1
min under a controlled atmosphere
...

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Standard Test Method for Thermal Stability by Thermogravimetry

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5.1 Thermogravimetry provides a rapid method for determining the thermal decomposition and reaction mass change of a material.  
5.2 This test method is useful in detecting potentially hazardous reactions and in estimating the temperatures at which these reactions occur. This test method is recommended as a screening test for detecting the thermal hazards of an uncharacterized material or mixture (see Section 8).  
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5.5 The four significant criteria of this test method are: the detection of a sample mass change; the extent of the mass change; the approximate temperature at which the event occurs; the observance of effects due to the atmosphere.
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1.1 This test method describes the assessment of material thermal stability through the determination of the temperature at which the materials start to decompose or react and the extent of the mass change using thermogravimetry. The test method uses minimum quantities of material and is applicable over the temperature range from ambient to 800 °C.  
1.2 The absence of reaction or decomposition is used as an indication of thermal stability in this test method under the experimental conditions used.  
1.3 This test method may be performed on solids or liquids, which do not sublime or vaporize in the temperature range of interest.  
1.4 This test method shall not be used by itself to establish a safe operating or storage temperature. It may be used in conjunction with other test methods (for example, Test Methods E487 and E537, and Guide E1981) as part of a hazard analysis of a material.  
1.5 This test method is normally applicable to reaction or decomposition occurring in the range from room temperature to 800 °C. The temperature range may be extended depending on the instrumentation used.  
1.6 This test method may be performed in an inert, a reactive or self-generated atmosphere.  
1.7 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.8 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.  
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SIGNIFICANCE AND USE
5.1 Thermogravimetry provides a rapid method for determining the thermal decomposition and reaction mass change of a material.  
5.2 This test method is useful in detecting potentially hazardous reactions and in estimating the temperatures at which these reactions occur. This test method is recommended as a screening test for detecting the thermal hazards of an uncharacterized material or mixture (see Section 8).  
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5.4 This test is not suitable for materials that sublime or vaporize in the temperature range of interest. A sample with volatile impurities needs to be purified prior to testing by thermogravimetric analysis. Alternatively, the sample can be tested as is, however, special caution is required during the data analysis. The mass loss due to the loss of impurity should not interfere with the determination of reaction or decomposition temperature.  
5.5 The four significant criteria of this test method are: the detection of a sample mass change; the extent of the mass change; the approximate temperature at which the event occurs; the observance of effects due to the atmosphere.
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1.1 This test method describes the assessment of material thermal stability through the determination of the temperature at which the materials start to decompose or react and the extent of the mass change using thermogravimetry. The test method uses minimum quantities of material and is applicable over the temperature range from ambient to 800 °C.  
1.2 The absence of reaction or decomposition is used as an indication of thermal stability in this test method under the experimental conditions used.  
1.3 This test method may be performed on solids or liquids, which do not sublime or vaporize in the temperature range of interest.  
1.4 This test method shall not be used by itself to establish a safe operating or storage temperature. It may be used in conjunction with other test methods (for example, Test Methods E487 and E537, and Guide E1981) as part of a hazard analysis of a material.  
1.5 This test method is normally applicable to reaction or decomposition occurring in the range from room temperature to 800 °C. The temperature range may be extended depending on the instrumentation used.  
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1.7 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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5.1 This test method can be used to determine whether the amount of draindown measured for a given asphalt mixture is within specified acceptable levels. The test provides an evaluation of the draindown potential of an asphalt mixture during mixture design and/or during field production. This test is primarily used for mixtures with high coarse aggregate content such as porous asphalt (open-graded friction course) and stone matrix asphalt (SMA).
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