ASTM D5418-01

Standard Test Method for Plastics: Dynamic Mechanical Properties: In Flexure (Dual Cantilever Beam)

SCOPE
1.1 This test method covers the use of dynamic mechanical instrumentation for gathering and reporting the viscoelastic properties of thermoplastic and thermosetting resins and composite systems in the form of rectangular bars molded directly or cut from sheets, plates, or molded shapes. The elastic modulus data generated may be used to identify the thermomechanical properties of a plastics material or composition.
1.2 This test method is intended to provide means for determining the modulus as a function of temperature of plastics using nonresonant forced-vibration techniques, as outlined in Practice D 4065. Plots of the elastic (storage), loss (viscous) and complex moduli, and tan delta as a function of frequency, time, or temperature are indicative of significant transitions in the thermomechanical performance of the polymeric material system.
1.3 This test method is valid for a wide range of frequencies, typically from 0.01 to 100 Hz.
1.4 Apparent discrepancies may arise in results obtained under differing experimental conditions. These apparent differences from results observed in another study can usually be reconciled, without changing the observed data, by reporting in full (as described in this test method) the conditions under which the data were obtained.
1.5 Test data obtained by this test method are relevant and appropriate for use in engineering design.
1.6 The values stated in SI units are to be regarded as standard.
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.
Note 1—There is no similar or equivalent ISO standard.

General Information

• Status: Historical
• Publication Date: 09-Sep-2001
• ICS: 83.140.01 - Rubber and plastics products in general
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.10 - Mechanical Properties

Relations

• Replaces: ASTM D5418-99 - Standard Test Method for Plastics: Dynamic Mechanical Properties: In Flexure (Dual Cantilever Beam)
• Effective Date: 10-Sep-2001
• Replaced By: ASTM D5418-07 - Standard Test Method for Plastics: Dynamic Mechanical Properties: In Flexure (Dual Cantilever Beam)
• Effective Date: 15-Mar-2007
• Referred By: ASTM D4065-20 - Standard Practice for Plastics: Dynamic Mechanical Properties: Determination and Report of Procedures
• Effective Date: 10-Sep-2001
• Referred By: ASTM D6382/D6382M-99(2022) - Standard Practice for Dynamic Mechanical Analysis and Thermogravimetry of Roofing and Waterproofing Membrane Material
• Effective Date: 10-Sep-2001

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:D5418–01
Standard Test Method for
Plastics: Dynamic Mechanical Properties: In Flexure (Dual
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Cantilever Beam)
This standard is issued under the fixed designation D 5418; 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 * D 4065 Practice for Determining and Reporting Dynamic
2
Mechanical Properties of Plastics
1.1 This test method covers the use of dynamic mechanical
D 4092 Terminology Relating to Dynamic Mechanical
instrumentation for gathering and reporting the viscoelastic
2
Measurements on Plastics
properties of thermoplastic and thermosetting resins and com-
D 5279 Test Method for Measuring the Dynamic Mechani-
posite systems in the form of rectangular bars molded directly
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cal Properties of Plastics in Torsion
or cut from sheets, plates, or molded shapes. The elastic
modulus data generated may be used to identify the thermo-
3. Terminology
mechanical properties of a plastics material or composition.
3.1 For definitions applicable to this practice see Terminol-
1.2 This test method is intended to provide means for
ogy D 4092.
determining the modulus as a function of temperature of
plastics using nonresonant forced-vibration techniques, as
4. Summary of Test Method
outlined in Practice D 4065. Plots of the elastic (storage), loss
4.1 This test method covers the determination of the elastic
(viscous) and complex moduli, and tan delta as a function of
modulus of plastics using dynamic mechanical techniques. A
frequency, time, or temperature are indicative of significant
bar of rectangular cross section is tested as a beam in dynamic
transitions in the thermomechanical performance of the poly-
linear displacement or bending. The dual-cantilever beam
meric material system.
specimen is gripped between two clamps. The specimen of
1.3 Thistestmethodisvalidforawiderangeoffrequencies,
known geometry is placed in mechanical linear displacement,
typically from 0.01 to 100 Hz.
with the displacement strain or deformation applied at the
1.4 Apparent discrepancies may arise in results obtained
center of the dual-cantilever beam. The forced-strain displace-
under differing experimental conditions. These apparent differ-
ment is at either a fixed frequency, or variable frequencies at
ences from results observed in another study can usually be
either isothermal condition, or with a linear temperature
reconciled,withoutchangingtheobserveddata,byreportingin
increase.The elastic or loss modulus, or both, of the polymeric
full (as described in this test method) the conditions under
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material system are measured in flexure.
which the data were obtained.
1.5 Test data obtained by this test method are relevant and
5. Significance and Use
appropriate for use in engineering design.
5.1 This test method provides a simple means of character-
1.6 The values stated in SI units are to be regarded as
izing the thermomechanical behavior of plastics materials
standard.
using a very small amount of material. Since small test
1.7 This standard does not purport to address all of the
specimen geometries are used, it is essential that the specimens
safety concerns, if any, associated with its use. It is the
be representative of the material being tested. The data
responsibility of the user of this standard to establish appro-
obtained may be used for quality control, research and devel-
priate safety and health practices and determine the applica-
opment, and establishment of optimum processing conditions.
bility of regulatory limitations prior to use.
5.2 Dynamic mechanical testing provides a sensitive
NOTE 1—There is no similar or equivalent ISO standard.
method for determining thermomechanical characteristics by
measuring the elastic and loss moduli as a function of
2. Referenced Documents
frequency, temperature, or time. Plots of moduli and tan delta
2.1 ASTM Standards:
1 2
This test method is under the jurisdiction ofASTM Committee D20 on Plastics Annual Book of ASTM Standards, Vol 08.02.
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and is the direct responsibility of Subcommittee D20.10 on Mechanical Properties. Annual Book of ASTM Standards, Vol 08.03.
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Current edition approved September 10, 2001. Published November 2001. The particular method for measurement of the elastic and loss moduli and tan
Originally published as D 5418 – 93. Last previous edition D 5418 – 99. delta depends upon the individual instrument’s operating principles.
*A Summary of Changes section appears at the end of this standard.
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