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ASTM E793-01

(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

SCOPE
1.1 This test method covers 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 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.7 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-May-2001
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 E793-95 - Standard Test Method for Enthalpies of Fusion and Crystallization by Differential Scanning Calorimetry
Effective Date
10-May-2001
Replaced By
ASTM E793-06 - Standard Test Method for Enthalpies of Fusion and Crystallization by Differential Scanning Calorimetry
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
10-May-2001
Referred By
ASTM F2902-16e1 - Standard Guide for Assessment of Absorbable Polymeric Implants
Effective Date
10-May-2001
Referred By
ASTM F3384-21 - Standard Specification for Polydioxanone Polymer Resins for Surgical Implants
Effective Date
10-May-2001
Referred By
ASTM E1231-19 - Standard Practice for Calculation of Hazard Potential Figures of Merit for Thermally Unstable Materials
Effective Date
10-May-2001
Referred By
ASTM F3510-21 - Standard Guide for Characterizing Fiber-Based Constructs for Tissue-Engineered Medical Products
Effective Date
10-May-2001
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
10-May-2001
Referred By
ASTM D5747/D5747M-21 - Standard Practice for Tests to Evaluate the Chemical Resistance of Geomembranes to Liquids
Effective Date
10-May-2001
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
10-May-2001
Referred By
ASTM E794-06(2018) - Standard Test Method for Melting And Crystallization Temperatures By Thermal Analysis
Effective Date
10-May-2001
Referred By
ASTM E1591-20 - Standard Guide for Obtaining Data for Fire Growth Models
Effective Date
10-May-2001
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
10-May-2001
Referred By
ASTM E928-19 - Standard Test Method for Purity by Differential Scanning Calorimetry
Effective Date
10-May-2001
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
10-May-2001

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ASTM E793-01 - Standard Test Method for Enthalpies of Fusion and Crystallization by Differential Scanning CalorimetryASTM E793-01 - Standard Test Method for Enthalpies of Fusion and Crystallization by Differential Scanning Calorimetry
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ASTM E793-01 - Standard Test Method for Enthalpies of Fusion and Crystallization by Differential Scanning Calorimetry
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Standards Content (Sample)

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:E793–01
Standard Test 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope E1142 Terminology Relating to Thermophysical Proper-
2
ties
1.1 This test method covers the determination of the en-
thalpy (heat) of fusion (melting) and crystallization by differ-
3. Terminology
ential scanning calorimetry (DSC).
3.1 Definitions—Specialized terms used in this test method
1.2 This test method is applicable to solid samples in
are defined in Terminologies E473 and E1142.
granular form or in any fabricated shape from which an
appropriate specimen can be cut, or to liquid samples that
4. Summary of Test Method
crystallize within the range of the instrument. Note, however,
4.1 This test method involves heating (or cooling) a test
that the results may be affected by the form and mass of the
specimen at a controlled rate in a controlled environment
specimen, as well as by other experimental conditions.
throughthetemperatureregionoffusionorcrystallization.The
1.3 Thenormaloperatingtemperaturerangeisfrom−120to
heat flow associated with fusion, an endothermic process (and
600°C. The temperature range can be extended depending
crystallization, an exothermic process), is recorded and inte-
upon the instrumentation used.
grated over time. Absolute values for the enthalpy of fusion
1.4 This test method is generally applicable to thermally
(andenthalpyofcrystallization)orrelativevaluesforcompara-
stable materials with well defined endothermic or exothermic
tive purposes can thus be obtained.
behavior.
1.5 Computer or electronic based instruments, techniques,
NOTE 1—Melting (or crystallization) temperatures are sometimes de-
or data treatment equivalent to those in this test method may termined in conjunction with measurements of the enthalpy of fusion or
crystallization.ThesetemperaturevaluesmaybeobtainedbyTestMethod
also be used.
E794.
1.6 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
5. Significance and Use
only.
5.1 Differential scanning calorimetry provides a rapid
1.7 This standard does not purport to address all of the
method for the determination of enthalpic changes accompa-
safety concerns, if any, associated with its use. It is the
nying first-order transitions of materials.
responsibility of the user of this standard to establish appro-
5.2 This test method is useful for quality control, specifica-
priate safety and health practices and determine the applica-
tion acceptance, and research.
bility of regulatory limitations prior to use.
6. Apparatus
2. Referenced Documents
6.1 Differential Scanning Calorimeter,capableofheatingor
2.1 ASTM Standards:
cooling rates up to at least 10°C/min and of automatically
2
E473 Terminology Relating to Thermal Analysis
recording the differential heat flow between a specimen and a
E794 Test Method for Melting Temperatures and Crystal-
reference material, both to the required sensitivity and preci-
2
lization Temperatures by Thermal Analysis
sion.Forcomparison,thesameheatingrateshallbeusedforall
E968 Practice for Heat Flow Calibration of Differential
calibrations and test runs. Thermal curves are recorded on a
2
Scanning Calorimeters
time based recorder for peak area measurements. The instru-
ments should have sufficient heat flow sensitivity to provide
1
precision of 61%. The instrument shall have a time base
ThistestmethodisunderthejurisdictionofASTMCommitteeE37onThermal
Measurements and is the direct responsibility of Subcommittee E37.01 on Test
precision of 61% over the time base range from 0.1 to 2.0
Methods and Recommended Practices.
min/cm(10.0to0.5cm/min)ofchart.Someinstrumentmodels
Current edition approved May 10, 2001. Published July 2001. Originally
allow computer acquisition of heat flow data which may be
published as E793–81. Last previous edition E793–95.
2
Annual Book of ASTM Standards, Vol 14.02. plotted.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
E793–01
2
6.2 Planimeter, or other method of area measurement with area of 30 to 60 cm under the fusion endotherm (or crystalli-
precision of 61% or better. zation exotherm). For digital data storage, select a sufficient
6.3 Specimen Capsule, material composed of aluminum or rate of data collection to minimize interpolation error. Typical
other material of high thermal
...

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