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ASTM E793-06

(Test Method)

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

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

SIGNIFICANCE AND USE
Differential scanning calorimetry provides a rapid method for the determination of enthalpic changes accompanying first-order transitions of materials.
This test method is useful for quality control, specification acceptance, and research.
SCOPE
1.1 This test method describes the determination of the enthalpy (heat) of fusion (melting) and crystallization by differential scanning calorimetry (DSC).
1.2 This test method is applicable to solid samples in granular form or in any fabricated shape from which an appropriate specimen can be cut, or to liquid samples that crystallize within the range of the instrument. Note, however, that the results may be affected by the form and mass of the specimen, as well as by other experimental conditions.
1.3 The normal operating temperature range is from -120 to 600°C. The temperature range can be extended depending upon the instrumentation used.
1.4 This test method is generally applicable to thermally stable materials with well defined endothermic or exothermic behavior.
1.5 Computer or electronic based instruments, techniques, or data treatment equivalent to those in this test method may also be used.
1.6 SI units are the standard.
1.7 The enthalpy of melting and crystallization portion of ISO 11357-3 is equivalent to 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
31-Aug-2006
ICS
17.200.10 - Heat. Calorimetry
Technical Committee
E37 - Thermal Measurements
Drafting Committee
E37.01 - Calorimetry and Mass Loss
Current Stage
Ref Project

Relations

Replaces
ASTM E793-01 - Standard Test Method for Enthalpies of Fusion and Crystallization by Differential Scanning Calorimetry
Effective Date
01-Sep-2006
Replaced By
ASTM E793-06(2012) - Standard Test Method for Enthalpies of Fusion and Crystallization by Differential Scanning Calorimetry
Effective Date
01-Sep-2012
Referred By
ASTM E1591-20 - Standard Guide for Obtaining Data for Fire Growth Models
Effective Date
01-Sep-2006
Referred By
ASTM E794-06(2018) - Standard Test Method for Melting And Crystallization Temperatures By Thermal Analysis
Effective Date
01-Sep-2006
Referred By
ASTM F1925-22 - Standard Specification for Semi-Crystalline Poly(lactide) Polymer and Copolymer Resins for Surgical Implants
Effective Date
01-Sep-2006
Referred By
ASTM D4591-22 - Standard Test Method for Determining Temperatures and Heats of Transitions of Fluoropolymers by Differential Scanning Calorimetry
Effective Date
01-Sep-2006
Referred By
ASTM F2625-10(2016) - Standard Test Method for Measurement of Enthalpy of Fusion, Percent Crystallinity, and Melting Point of Ultra-High-Molecular Weight Polyethylene by Means of Differential Scanning Calorimetry
Effective Date
01-Sep-2006
Referred By
ASTM E928-19 - Standard Test Method for Purity by Differential Scanning Calorimetry
Effective Date
01-Sep-2006
Referred By
ASTM E1231-19 - Standard Practice for Calculation of Hazard Potential Figures of Merit for Thermally Unstable Materials
Effective Date
01-Sep-2006
Referred By
ASTM C1784-20 - Standard Test Method for Using a Heat Flow Meter Apparatus for Measuring Thermal Storage Properties of Phase Change Materials and Products
Effective Date
01-Sep-2006
Referred By
ASTM F2313-18 - Standard Specification for Poly(glycolide) and Poly(glycolide-co-lactide) Resins for Surgical Implants with Mole Fractions Greater Than or Equal to 70 % Glycolide
Effective Date
01-Sep-2006
Referred By
ASTM F3384-21 - Standard Specification for Polydioxanone Polymer Resins for Surgical Implants
Effective Date
01-Sep-2006
Referred By
ASTM F3510-21 - Standard Guide for Characterizing Fiber-Based Constructs for Tissue-Engineered Medical Products
Effective Date
01-Sep-2006
Referred By
ASTM F2150-19 - Standard Guide for Characterization and Testing of Biomaterial Scaffolds Used in Regenerative Medicine and Tissue-Engineered Medical Products
Effective Date
01-Sep-2006
Referred By
ASTM F2902-16e1 - Standard Guide for Assessment of Absorbable Polymeric Implants
Effective Date
01-Sep-2006

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ASTM E793-06 - Standard Test Method for Enthalpies of Fusion and Crystallization by Differential Scanning CalorimetryASTM E793-06 - Standard Test Method for Enthalpies of Fusion and Crystallization by Differential Scanning Calorimetry
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ASTM E793-06 - Standard Test Method for Enthalpies of Fusion and Crystallization by Differential Scanning Calorimetry
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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: E793 − 06
StandardTest Method for
Enthalpies of Fusion and Crystallization by Differential
1
Scanning Calorimetry
This standard is issued under the fixed designation E793; 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
E794TestMethodforMeltingAndCrystallizationTempera-
enthalpy (heat) of fusion (melting) and crystallization by
tures By Thermal Analysis
differential scanning calorimetry (DSC).
E968Practice for Heat Flow Calibration of Differential
1.2 This test method is applicable to solid samples in
Scanning Calorimeters
granular form or in any fabricated shape from which an
E1142Terminology Relating to Thermophysical Properties
appropriate specimen can be cut, or to liquid samples that
E1860Test Method for Elapsed Time Calibration of Ther-
crystallize within the range of the instrument. Note, however,
mal Analyzers
that the results may be affected by the form and mass of the
3
2.2 ISO Standard:
specimen, as well as by other experimental conditions.
ISO 11357–3Plastics – Differential Scanning Calorimetry
1.3 Thenormaloperatingtemperaturerangeisfrom−120to
(DSC)–Part3:TemperatureandEnthalpyofMeltingand
600°C. The temperature range can be extended depending
Crystallization
upon the instrumentation used.
3. Terminology
1.4 This test method is generally applicable to thermally
stable materials with well defined endothermic or exothermic 3.1 Definitions—Specialized terms used in this test method
behavior.
are defined in Terminologies E473 and E1142.
1.5 Computer or electronic based instruments, techniques,
4. Summary of Test Method
or data treatment equivalent to those in this test method may
4.1 This test method involves heating (or cooling) a test
also be used.
specimen at a controlled rate in a controlled environment
1.6 SI units are the standard.
throughthetemperatureregionoffusionorcrystallization.The
1.7 The enthalpy of melting and crystallization portion of
heat flow associated with fusion, an endothermic process (and
ISO 11357-3 is equivalent to this standard.
crystallization, an exothermic process), is recorded and inte-
1.8 This standard does not purport to address all of the
grated over time. Absolute values for the enthalpy of fusion
safety concerns, if any, associated with its use. It is the (andenthalpyofcrystallization)orrelativevaluesforcompara-
responsibility of the user of this standard to establish appro-
tive purposes can thus be obtained.
priate safety and health practices and determine the applica-
NOTE 1—Melting (or crystallization) temperatures are sometimes de-
bility of regulatory limitations prior to use.
termined in conjunction with measurements of the enthalpy of fusion or
crystallization.ThesetemperaturevaluesmaybeobtainedbyTestMethod
2. Referenced Documents E794.
2
2.1 ASTM Standards:
5. Significance and Use
5.1 Differential scanning calorimetry provides a rapid
1
method for the determination of enthalpic changes accompa-
ThistestmethodisunderthejurisdictionofASTMCommitteeE37onThermal
Measurements and is the direct responsibility of Subcommittee E37.01 on Calo-
nying first-order transitions of materials.
rimetry and Mass Loss.
5.2 This test method is useful for quality control, specifica-
Current edition approved Sept. 1, 2006. Published October 2006. Originally
approved in 1981. Last previous edition approved in 2001 as E793–01. DOI:
tion acceptance, and research.
10.1520/E0793-06.
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 ----------------------
E793 − 06
6. Apparatus 7.2 Toxic or corrosive effluents, or both, may be released
when heating the material and could be harmful to the
6.1 DSC, The essential instrumentation required to provide
personnel or the apparatus.
the minimum differential scanning calorimetric capability for
7.3 Samples that release volatiles upon heating will change
this method includes:
mass and invalidate the test.
6.1.1 DSC Test Chamber composed of:
7.4 In the use of commercial instrumentation, the operator
6.1.1.1 a furnace(s), to provide uniform
...

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