Standard Test Method for Transition Temperatures and Enthalpies of Fusion and Crystallization of Polymers by Differential Scanning Calorimetry

SIGNIFICANCE AND USE
Thermal analysis provides a rapid method for measuring transitions due to morphological or chemical changes, in a polymer as it is heated/cooled through a specified temperature range. Change in specific heat capacity, heat flow and temperature values are determined for these transitions. Differential scanning calorimetry is used to assist in identifying specific polymers, polymer alloys, and certain polymer additives, which exhibit thermal transitions. Chemical reactions that cause or affect certain transitions have been measured with the aid of this technique; such reactions include oxidation, curing of thermosetting resins, and thermal decomposition.
This test method is useful for specification acceptance, process control, and research.
SCOPE
1.1 This test method covers determination of transition temperatures and enthalpies of fusion and crystallization of polymers by differential scanning calorimetry.p>Note 1—True heats of fusion are to be determined in conjunction with structure investigation, and frequently, specialized crystallization techniques are needed.
1.2 This test method is applicable to polymers in granular form or to any fabricated shape from which it is possible to cut appropriate specimens.
1.3 The normal operating temperature range is from the cryogenic region to 600°C. Certain equipment allows the temperature range to be extended.
1.4 The values stated in SI units are the standard.
Note 2—This test method does not apply to all types of polymers as written (see 6.8).
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 and health practices and determine the applicability of regulatory limitations prior to use.
Note 3—This standard is similar but not equivalent to ISO 11357-1, -2, -3. The ISO procedures provide additional information not supplied by this test method.

General Information

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Historical
Publication Date
30-Nov-2003
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Drafting Committee
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ASTM D3418-03 - Standard Test Method for Transition Temperatures and Enthalpies of Fusion and Crystallization of Polymers by Differential Scanning Calorimetry
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D3418–03
Standard Test Method for
Transition Temperatures and Enthalpies of Fusion and
Crystallization of Polymers by Differential Scanning
1
Calorimetry
This standard is issued under the fixed designation D 3418; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* E 794 Test Method for Melting and Crystallization Tem-
perature by Thermal Analysis
1.1 This test method covers determination of transition
E 967 Practice for Temperature Calibration of Differential
temperatures and enthalpies of fusion and crystallization of
Scanning Calorimeters and Differential ThermalAnalyzers
polymers by differential scanning calorimetry.
E 968 Practice for Heat Flow Calibration of Differential
NOTE 1—True heats of fusion are to be determined in conjunction with
Scanning Calorimeters
structure investigation, and frequently, specialized crystallization tech-
E 1142 Terminology Relating toThermophysical Properties
niques are needed.
E 1356 Test Method for Glass Transition Temperatures by
1.2 This test method is applicable to polymers in granular
Differential Scanning Calorimetry or Differential Thermal
form or to any fabricated shape from which it is possible to cut
Analysis
appropriate specimens.
E 1953 Practice for Description of ThermalAnalysisAppa-
1.3 The normal operating temperature range is from the
ratus
3
cryogenic region to 600°C. Certain equipment allows the
2.2 ISO Standards:
temperature range to be extended.
ISO 11357-1 Plastics—Differential Scanning Calorimetry
1.4 The values stated in SI units are the standard.
(DSC)—Part 1: General Principles
ISO 11357-2 Plastics—Differential Scanning Calorimetry
NOTE 2—This test method does not apply to all types of polymers as
written (see 6.8). (DSC)—Part 2: Determination of Glass Transition Tem-
perature
1.5 This standard does not purport to address all of the
ISO 11357-3 Plastics—Differential Scanning Calorimetry
safety concerns, if any, associated with its use. It is the
(DSC)—Part 3: Determination of Temperature and En-
responsibility of the user of this standard to establish appro-
thalpy of Melting and Crystallization
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
3. Terminology
NOTE 3—ThisstandardissimilarbutnotequivalenttoISO 11357-1,-2,
3.1 Specialized terms used in this test method are defined in
-3. The ISO procedures provide additional information not supplied by
Terminologies E 473 and E 1142.
this test method.
4. Summary of Test Method
2. Referenced Documents
4.1 This test method consists of heating or cooling the test
2
2.1 ASTM Standards:
material at a controlled rate under a specified purge gas at a
E 473 Terminology Relating to Thermal Analysis
controlled flow rate and continuously monitoring with a
E 793 Test Method for Enthalpies of Productivity and
suitable sensing device the difference in heat input between a
Crystallization by Differential Scanning Calorimetry
reference material and a test material due to energy changes in
the material.Atransition is marked by absorption or release of
energy by the specimen resulting in a corresponding endother-
1
This test method is under the jurisdiction ofASTM Committee D20 on Plastics
mic or exothermic peak or baseline shift in the heating or
and is the direct responsibility of Subcommittee D20.30 on Thermal Properties
cooling curve. Areas under the crystallization exotherm or
(Section D20.30.07).
fusionendothermofthetestmaterialsarecomparedagainstthe
Current edition approved Dec. 1, 2003. Published January 2004. Originally
approved in 1975. Last previous edition approved in 1999 as D 3418 - 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 fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D3418–03
respective areas obtained by the treatment of a well- 7. Apparatus
characterized standard.
7.1 Differential Scanning Calorimeter (DSC)—The essen-
tial instrumentation required to provide the minimum differen-
5. Significance and Use
tial scanning calorimetric capa
...

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