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ASTM E1824-96

(Test Method)

Standard Test Method for Assignment of a Glass Transition Temperature Using Thermomechanical Analysis Under Tension

Standard Test Method for Assignment of a Glass Transition Temperature Using Thermomechanical Analysis Under Tension

SCOPE
1.1 This test method covers a procedure for the assignment of a glass transition temperature of materials on heating using thermomechanical measurements under tension under prescribed experimental conditions.  
1.2 This test method may be used as a complement to Test Method E 1545 and is applicable to amorphous or to partially crystalline materials in the form of films, fibers, wires, etc. that are sufficiently rigid to inhibit extension during loading at ambient temperature.  
1.3 The generally applicable temperature range for this test method is -100 to 600 degrees C. This temperature range may be altered depending upon 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 The values stated in SI units are to be regarded as the 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.

General Information

Status
Historical
Publication Date
09-Sep-1996
ICS
81.040.01 - Glass in general
Technical Committee
E37 - Thermal Measurements
Drafting Committee
E37.10 - Fundamental, Statistical and Mechanical Properties
Current Stage
Ref Project

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Replaced By
ASTM E1824-02 - Standard Test Method for Assignment of a Glass Transition Temperature Using Thermomechanical Analysis Under Tension
Effective Date
10-May-2002

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ASTM E1824-96 - Standard Test Method for Assignment of a Glass Transition Temperature Using Thermomechanical Analysis Under TensionASTM E1824-96 - Standard Test Method for Assignment of a Glass Transition Temperature Using Thermomechanical Analysis Under Tension
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ASTM E1824-96 - Standard Test Method for Assignment of a Glass Transition Temperature Using Thermomechanical Analysis Under Tension
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Standards Content (Sample)

Designation: E 1824 – 96
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Assignment of a Glass Transition Temperature Using
1
Thermomechanical Analysis Under Tension
This standard is issued under the fixed designation E 1824; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
1.1 This test method covers a procedure for the assignment 3.1 Definitions:
of a glass transition temperature of materials on heating using 3.1.1 The following terms are applicable to this test method
thermomechanical measurements under tension under pre- and can be found in Terminology E 473 and Terminology
scribed experimental conditions. E 1142: thermomechanical analysis (TMA), thermodilatom-
1.2 This test method may be used as a complement to Test etry, glass transition, glass transition temperature.
Method E 1545 and is applicable to amorphous or to partially
4. Summary of Test Method
crystalline materials in the form of films, fibers, wires, etc. that
4.1 This test method uses thermomechanical analysis equip-
are sufficiently rigid to inhibit extension during loading at
ambient temperature. ment (thermomechanical analyzer, dilatometer, or similar de-
vice) in the tensile mode to determine the change in dimension
1.3 The generally applicable temperature range for this test
method is − 100 to 600°C. This temperature range may be of a thin specimen observed when the material is subjected to
a constant heating rate through the glass transition regime. This
altered depending upon the instrumentation used.
1.4 Computer or electronic-based instruments, techniques, change in dimension associated with the change from vitreous
solid to amorphous liquid is observed as movement of a
or data treatment equivalent to this test method may also be
used. sensing probe in direct contact with the specimen and is
recorded as a function of temperature. The intersection of the
NOTE 1—Users of this test method are expressly advised that all such
extrapolation of the slope of the probe displacement curve
instruments or techniques may not be equivalent. It is the responsibility of
before and after the transition is used to determine a tempera-
the user of this test method to determine the necessary equivalency prior
ture that is assigned as the glass transition temperature.
to use.
1.5 The values stated in SI units are to be regarded as the
5. Significance and Use
standard.
5.1 The glass transition is dependent on the thermal history,
1.6 This standard does not purport to address all of the
softening agents or additives of the material to be tested. For
safety concerns, if any, associated with its use. It is the
amorphous and semicrystalline materials the assignment of a
responsibility of the user of this standard to establish appro-
glass transition temperature may lead to important information
priate safety and health practices and determine the applica-
about thermal history, processing conditions, stability, progress
bility of regulatory limitations prior to use.
of chemical reactions, and mechanical and electrical behavior.
5.2 Thermomechanical analysis provides a rapid means of
2. Referenced Documents
detecting changes in hardness or linear dimensional change
2.1 ASTM Standards:
associated with the glass transition.
2
E 473 Terminology Relating to Thermal Analysis
5.3 This test method is useful for research and development,
E 1142 Terminology Relating to Thermophysical Proper-
quality control, and specification acceptance testing; particu-
2
ties
larly of films and fibers.
E 1545 Test Method for Glass Transition Temperatures by
2
Thermomechanical Analysis
6. Interferences
6.1 This test method may be used for materials having a
glass transition at or below ambient temperature providing care
is taken to avoid exposing the specimen to a tensile force prior
1 to cooling the specimen below its glass transition. Applying a
This test method is under the jurisdiction of ASTM Committee E-37 on
Thermal Measurements and is the direct responsibility of Subcommittee E37.01 on tensile load on a specimen that is above its glass transition will
Test Methods and Recommended Practices.
result in elongation of the specimen which may introduce
Current edition approved Sept. 10, 1996. Published December 1996.
orientation and residual stresses that will alter the specimen
2
Annual Book of ASTM Standards, Vol 14.02.
1

---------------------- Page: 1 ----------------------
E 1824
thermal history and may yield erroneous results during the 7.2.1 Coolant System, that can be coupled directly to the
heating cycle. furnace/temperature controller to hasten recovery from el-
6.2 Spe
...

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