ASTM D5026-23
(Test Method)Standard Test Method for Plastics: Dynamic Mechanical Properties: In Tension
Standard Test Method for Plastics: Dynamic Mechanical Properties: In Tension
SIGNIFICANCE AND USE
5.1 This test method provides a simple means of characterizing the thermomechanical behavior of plastic materials using very small amounts of material. The data obtained is used for quality control, research and development, as well as the establishment of optimum processing conditions.
5.2 Dynamic mechanical testing provides a sensitive method for determining thermomechanical characteristics by measuring the elastic and loss moduli as a function of frequency, temperature, or time. Plots of moduli and tan delta of a material versus these variables can be used to provide graphical representation indicative of functional properties, effectiveness of cure (thermosetting resin system), and damping behavior under specified conditions.
5.2.1 Observed data are specific to experimental conditions. Reporting in full (as described in this test method) the conditions under which the data was obtained is essential to assist users with interpreting the data an reconciling apparent or perceived discrepancies.
5.3 This test method can be used to assess:
5.3.1 Modulus as a function of temperature,
5.3.2 Modulus as a function of frequency,
5.3.3 The effects of processing treatment, including orientation,
5.3.4 Relative resin behavioral properties, including cure and damping,
5.3.5 The effects of substrate types and orientation (fabrication) on elastic modulus,
5.3.6 The effects of formulation additives which might affect processability or performance,
5.3.7 The effects of annealing on modulus and glass transition temperature,
5.3.8 The effect of aspect ratio on the modulus of fiber reinforcements, and
5.3.9 The effect of fillers, additives on modulus and glass transition temperature.
5.4 Before proceeding with this test method, make reference to the specification of the material being tested. Any test specimen preparation, conditioning, dimensions, or testing parameters, or combination thereof, covered in the relevant ASTM materials specificati...
SCOPE
1.1 This test method outlines 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 specimens molded directly or cut from sheets, plates, or molded shapes. The tensile data generated is used to identify the thermomechanical properties of a plastic material or composition using a variety of dynamic mechanical instruments.
1.2 This test method is intended to provide a means for determining viscoelastic properties of a wide variety of plastic materials using nonresonant forced-vibration techniques, in accordance with Practice D4065. Plots of the elastic (storage) modulus; loss (viscous) modulus; complex modulus 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 Hz to 100 Hz.
1.4 Due to possible instrumentation compliance, the data generated are intended to indicate relative and not necessarily absolute property values.
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. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 1: This test method is technically equivalent to ISO 6721, Part 4.
1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Pri...
General Information
- Status
- Published
- Publication Date
- 30-Sep-2023
- Technical Committee
- D20 - Plastics
- Drafting Committee
- D20.10 - Mechanical Properties
Relations
- Replaces
ASTM D5026-15 - Standard Test Method for Plastics: Dynamic Mechanical Properties: In Tension - Effective Date
- 01-Oct-2023
- Effective Date
- 01-Feb-2024
- Effective Date
- 01-Nov-2023
- Effective Date
- 01-Nov-2022
- Effective Date
- 01-Apr-2022
- Effective Date
- 01-Apr-2022
- Effective Date
- 01-Oct-2023
- Effective Date
- 01-Oct-2023
Overview
ASTM D5026-23 is a standardized test method developed by ASTM International for determining the dynamic mechanical properties of plastics in tension. This method outlines procedures for using dynamic mechanical analysis (DMA) to measure viscoelastic properties, including storage (elastic) modulus, loss (viscous) modulus, complex modulus, and tan delta, of thermoplastic, thermosetting resins, and plastic composites. Employing a variety of dynamic mechanical instruments, this standard is essential for engineers, manufacturers, and researchers seeking reliable data for quality control, research, development, and establishing optimum processing conditions for polymeric materials.
Key Topics
- Dynamic Mechanical Properties: This standard provides guidelines for evaluating key viscoelastic properties such as storage modulus (elastic response) and loss modulus (energy dissipation) in plastics under dynamic tension.
- Test Specimen Requirements: Specimens must be rectangular, cut or molded from sheets, plates, or shapes, and conditioned according to relevant ASTM procedures to ensure consistency and comparability.
- Measurement Parameters: The method supports a wide frequency range, typically from 0.01 Hz to 100 Hz, and can assess material properties as a function of temperature, frequency, time, or strain.
- Data Interpretation: Results are context-dependent, requiring detailed reporting of test conditions (temperature, frequency, amplitude) to ensure reproducibility and accurate interpretation.
- Quality Assurance: D5026-23 highlights its value for quality control in manufacturing, plus research and development, providing key insights into process optimization and material selection.
Applications
The practical value of ASTM D5026-23 lies in its versatility across the plastics industry and research sector:
- Material Characterization: Evaluate the thermomechanical behavior of polymers, including glass transition temperature, modulus changes, and damping characteristics.
- Quality Control: Establish benchmarks for modulus and damping properties to monitor consistency of plastic materials in production lots.
- Product Development: Compare effects of formulation additives, fiber reinforcement aspect ratios, or different substrate orientations on viscoelastic properties, aiding in the development of improved products.
- Process Optimization: Assess the influence of manufacturing processes (e.g., annealing, orientation, fabrication) on mechanical performance, enabling the establishment of optimal processing parameters.
- Performance Assessment: Utilize dynamic mechanical testing to predict functional properties under service conditions such as vibration or temperature fluctuations.
- Comparative Analysis: Benchmark various polymer systems, resin cures, or additive effects for material selection and innovation.
- Engineering Design: Integrate relevant dynamic mechanical data into design calculations for components subject to mechanical stress or variable temperatures.
Related Standards
When applying ASTM D5026-23, it is recommended to reference the following related standards for terminology, specimen preparation, and test procedures:
- ASTM D4065: Practice for Plastics-Dynamic Mechanical Properties: Determination and Report of Procedures (key for nonresonant forced-vibration techniques)
- ASTM D618: Practice for Conditioning Plastics for Testing
- ASTM D883: Terminology Relating to Plastics
- ASTM D4092: Terminology for Plastics: Dynamic Mechanical Properties
- ASTM D4000: Classification System for Specifying Plastic Materials
- ISO 6721, Part 4: Plastics-Determination of Dynamic Mechanical Properties, Part 4: Tensile Vibration-Non-Resonance Method (technical equivalence)
By following ASTM D5026-23 and related standards, organizations gain robust, standardized methods for assessing the dynamic mechanical performance of plastic materials, leading to improved product quality, performance, and reliability.
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Frequently Asked Questions
ASTM D5026-23 is a standard published by ASTM International. Its full title is "Standard Test Method for Plastics: Dynamic Mechanical Properties: In Tension". This standard covers: SIGNIFICANCE AND USE 5.1 This test method provides a simple means of characterizing the thermomechanical behavior of plastic materials using very small amounts of material. The data obtained is used for quality control, research and development, as well as the establishment of optimum processing conditions. 5.2 Dynamic mechanical testing provides a sensitive method for determining thermomechanical characteristics by measuring the elastic and loss moduli as a function of frequency, temperature, or time. Plots of moduli and tan delta of a material versus these variables can be used to provide graphical representation indicative of functional properties, effectiveness of cure (thermosetting resin system), and damping behavior under specified conditions. 5.2.1 Observed data are specific to experimental conditions. Reporting in full (as described in this test method) the conditions under which the data was obtained is essential to assist users with interpreting the data an reconciling apparent or perceived discrepancies. 5.3 This test method can be used to assess: 5.3.1 Modulus as a function of temperature, 5.3.2 Modulus as a function of frequency, 5.3.3 The effects of processing treatment, including orientation, 5.3.4 Relative resin behavioral properties, including cure and damping, 5.3.5 The effects of substrate types and orientation (fabrication) on elastic modulus, 5.3.6 The effects of formulation additives which might affect processability or performance, 5.3.7 The effects of annealing on modulus and glass transition temperature, 5.3.8 The effect of aspect ratio on the modulus of fiber reinforcements, and 5.3.9 The effect of fillers, additives on modulus and glass transition temperature. 5.4 Before proceeding with this test method, make reference to the specification of the material being tested. Any test specimen preparation, conditioning, dimensions, or testing parameters, or combination thereof, covered in the relevant ASTM materials specificati... SCOPE 1.1 This test method outlines 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 specimens molded directly or cut from sheets, plates, or molded shapes. The tensile data generated is used to identify the thermomechanical properties of a plastic material or composition using a variety of dynamic mechanical instruments. 1.2 This test method is intended to provide a means for determining viscoelastic properties of a wide variety of plastic materials using nonresonant forced-vibration techniques, in accordance with Practice D4065. Plots of the elastic (storage) modulus; loss (viscous) modulus; complex modulus 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 Hz to 100 Hz. 1.4 Due to possible instrumentation compliance, the data generated are intended to indicate relative and not necessarily absolute property values. 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. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Note 1: This test method is technically equivalent to ISO 6721, Part 4. 1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Pri...
SIGNIFICANCE AND USE 5.1 This test method provides a simple means of characterizing the thermomechanical behavior of plastic materials using very small amounts of material. The data obtained is used for quality control, research and development, as well as the establishment of optimum processing conditions. 5.2 Dynamic mechanical testing provides a sensitive method for determining thermomechanical characteristics by measuring the elastic and loss moduli as a function of frequency, temperature, or time. Plots of moduli and tan delta of a material versus these variables can be used to provide graphical representation indicative of functional properties, effectiveness of cure (thermosetting resin system), and damping behavior under specified conditions. 5.2.1 Observed data are specific to experimental conditions. Reporting in full (as described in this test method) the conditions under which the data was obtained is essential to assist users with interpreting the data an reconciling apparent or perceived discrepancies. 5.3 This test method can be used to assess: 5.3.1 Modulus as a function of temperature, 5.3.2 Modulus as a function of frequency, 5.3.3 The effects of processing treatment, including orientation, 5.3.4 Relative resin behavioral properties, including cure and damping, 5.3.5 The effects of substrate types and orientation (fabrication) on elastic modulus, 5.3.6 The effects of formulation additives which might affect processability or performance, 5.3.7 The effects of annealing on modulus and glass transition temperature, 5.3.8 The effect of aspect ratio on the modulus of fiber reinforcements, and 5.3.9 The effect of fillers, additives on modulus and glass transition temperature. 5.4 Before proceeding with this test method, make reference to the specification of the material being tested. Any test specimen preparation, conditioning, dimensions, or testing parameters, or combination thereof, covered in the relevant ASTM materials specificati... SCOPE 1.1 This test method outlines 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 specimens molded directly or cut from sheets, plates, or molded shapes. The tensile data generated is used to identify the thermomechanical properties of a plastic material or composition using a variety of dynamic mechanical instruments. 1.2 This test method is intended to provide a means for determining viscoelastic properties of a wide variety of plastic materials using nonresonant forced-vibration techniques, in accordance with Practice D4065. Plots of the elastic (storage) modulus; loss (viscous) modulus; complex modulus 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 Hz to 100 Hz. 1.4 Due to possible instrumentation compliance, the data generated are intended to indicate relative and not necessarily absolute property values. 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. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Note 1: This test method is technically equivalent to ISO 6721, Part 4. 1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Pri...
ASTM D5026-23 is classified under the following ICS (International Classification for Standards) categories: 83.080.01 - Plastics in general. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM D5026-23 has the following relationships with other standards: It is inter standard links to ASTM D5026-15, ASTM D883-24, ASTM D883-23, ASTM D883-22, ASTM E456-13a(2022)e1, ASTM E456-13a(2022), ASTM D4065-20, ASTM D6382/D6382M-99(2022). Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM D5026-23 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D5026 − 23
Standard Test Method for
Plastics: Dynamic Mechanical Properties: In Tension
This standard is issued under the fixed designation D5026; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope* ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
1.1 This test method outlines the use of dynamic mechanical
mendations issued by the World Trade Organization Technical
instrumentation for gathering and reporting the viscoelastic
Barriers to Trade (TBT) Committee.
properties of thermoplastic and thermosetting resins and com-
posite systems in the form of rectangular specimens molded
2. Referenced Documents
directly or cut from sheets, plates, or molded shapes. The
2.1 ASTM Standards:
tensile data generated is used to identify the thermomechanical
D618 Practice for Conditioning Plastics for Testing
properties of a plastic material or composition using a variety
D883 Terminology Relating to Plastics
of dynamic mechanical instruments.
D4000 Classification System for Specifying Plastic Materi-
1.2 This test method is intended to provide a means for
als
determining viscoelastic properties of a wide variety of plastic
D4065 Practice for Plastics: Dynamic Mechanical Proper-
materials using nonresonant forced-vibration techniques, in
ties: Determination and Report of Procedures
accordance with Practice D4065. Plots of the elastic (storage)
D4092 Terminology for Plastics: Dynamic Mechanical
modulus; loss (viscous) modulus; complex modulus and tan
Properties
delta as a function of frequency, time, or temperature are
E456 Terminology Relating to Quality and Statistics
indicative of significant transitions in the thermomechanical
IEEE/ASTM SI-10 Practice for Use of the International
performance of the polymeric material system.
System of Units (SI) (the Modernized Metric System)
1.3 This test method is valid for a wide range of frequencies,
2.2 ISO Standard:
typically from 0.01 Hz to 100 Hz.
ISO 6721, Part 4 Plastics—Determination of Dynamic Me-
chanical Properties, Part 4: Tensile Vibration—Non-
1.4 Due to possible instrumentation compliance, the data
Resonance Method
generated are intended to indicate relative and not necessarily
absolute property values.
3. Terminology
1.5 Test data obtained by this test method are relevant and
3.1 Definitions—Terms used in this standard are defined in
appropriate for use in engineering design.
accordance Standard D4092 and Terminology D883 unless
1.6 The values stated in SI units are to be regarded as
otherwise specified. For terms relating to precision and bias
standard. The values given in parentheses are for information
and other associated statistical issues, the terms used in this
only.
standard are defined in accordance with Terminology E456.
1.7 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 4. Summary of Test Method
responsibility of the user of this standard to establish appro-
4.1 This test method covers the determination of the vis-
priate safety, health, and environmental practices and deter-
coelastic properties of a plastic material using dynamic me-
mine the applicability of regulatory limitations prior to use.
chanical techniques in tension. A test specimen of rectangular
cross section is tested in dynamic tension. The specimen is
NOTE 1—This test method is technically equivalent to ISO 6721, Part 4.
gripped longitudinally between two clamps. The specimen is
1.8 This international standard was developed in accor-
placed in mechanical linear tensile displacement at fixed
dance with internationally recognized principles on standard-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
This test method is under the jurisdiction of ASTM Committee D20 on Plastics contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
and is the direct responsibility of Subcommittee D20.10 on Mechanical Properties. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Oct. 1, 2023. Published November 2023. Originally the ASTM website.
approved in 1989. Last previous edition approved in 2015 as D5026 - 15. DOI: Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
10.1520/D5026-23. 4th Floor, New York, NY 10036, http://www.ansi.org.
*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
D5026 − 23
frequencies with a linear temperature variation or variable 7. Apparatus
frequencies at isothermal conditions. The elastic moduli or loss
7.1 The function of the apparatus is to hold a rectangular
moduli, or both, of the polymeric material system are measured
test specimen of a polymeric material system so that the
in tension.
material acts as the elastic and dissipative element in a
mechanically driven linear displacement system. Dynamic
NOTE 2—The particular method for measurement of the elastic and loss
moduli and tan delta depends upon the individual instrument’s operating
mechanical instruments described in this test method generally
principles.
operate in a forced, constant amplitude, at a fixed frequency.
7.2 The apparatus shall consist of the following:
5. Significance and Use
7.2.1 Fixed Member—A fixed or essentially stationary
5.1 This test method provides a simple means of character-
member carrying one grip.
izing the thermomechanical behavior of plastic materials using
7.2.2 Movable Member—A movable member carrying a
very small amounts of material. The data obtained is used for
second grip.
quality control, research and development, as well as the
7.2.3 Grips—Grips for holding the test specimen between
establishment of optimum processing conditions.
the fixed member and the movable member. The grips shall be
mechanically aligned, that is, they shall be attached to the fixed
5.2 Dynamic mechanical testing provides a sensitive
and movable member, respectively, in such a manner that they
method for determining thermomechanical characteristics by
will move freely into alignment as soon as any load is applied,
measuring the elastic and loss moduli as a function of
so that the long axis of the test specimen will coincide with the
frequency, temperature, or time. Plots of moduli and tan delta
direction of the applied pull through the center line of the grip
of a material versus these variables can be used to provide
assembly.
graphical representation indicative of functional properties,
7.2.3.1 The test specimen shall be held in such a way that
effectiveness of cure (thermosetting resin system), and damp-
slippage relative to the grips is prevented as much as possible.
ing behavior under specified conditions.
7.2.4 Linear Deformation (Strain) Device—A device for
5.2.1 Observed data are specific to experimental conditions.
applying a continuous linear deformation (strain) to the speci-
Reporting in full (as described in this test method) the
men. In the force-displacement device the deformation (strain)
conditions under which the data was obtained is essential to
is applied and then released (see Table 1 of Practice D4065).
ass
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D5026 − 15 D5026 − 23
Standard Test Method for
Plastics: Dynamic Mechanical Properties: In Tension
This standard is issued under the fixed designation D5026; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This test method outlines 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 specimens molded directly or cut from
sheets, plates, or molded shapes. The tensile data generated may be is used to identify the thermomechanical properties of a plastic
material or composition using a variety of dynamic mechanical instruments.
1.2 This test method is intended to provide a means for determining viscoelastic properties of a wide variety of plastic materials
using nonresonant forced-vibration techniques, in accordance with Practice D4065. Plots of the elastic (storage) modulus; loss
(viscous) modulus; complex modulus 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.0.01 Hz 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.
1.4 Due to possible instrumentation compliance, the data generated are intended to indicate relative and not necessarily absolute
property values.
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. 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 healthsafety, health, and environmental practices and determine
the applicability of regulatory limitations prior to use.
NOTE 1—This test method is technically equivalent to ISO 6721, Part 4.
1.8 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
This test method is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.10 on Mechanical Properties.
Current edition approved July 1, 2015Oct. 1, 2023. Published July 2015November 2023. Originally approved in 1989. Last previous edition approved in 20142015 as
ε1
D5026 - 06D5026 - 15.(2014) . DOI: 10.1520/D5026-15.10.1520/D5026-23.
*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
D5026 − 23
2. Referenced Documents
2.1 ASTM Standards:
D618 Practice for Conditioning Plastics for Testing
D883 Terminology Relating to Plastics
D4000 Classification System for Specifying Plastic Materials
D4065 Practice for Plastics: Dynamic Mechanical Properties: Determination and Report of Procedures
D4092 Terminology for Plastics: Dynamic Mechanical Properties
E456 Terminology Relating to Quality and Statistics
IEEE/ASTM SI-10 Practice for Use of the International System of Units (SI) (the Modernized Metric System)
2.2 ISO Standard:
ISO 6721, Part 4 Plastics—Determination of Dynamic Mechanical Properties, Part 4: Tensile Vibration—Non-Resonance
Method
3. Terminology
3.1 Definitions—Terms used in this standard are defined in accordance Standard D4092 and Terminology D883For definitions
applicable to this test method refer to unless otherwise specified. For terms relating to precision and bias and other associated
statistical issues, the terms used in this standard are defined in accordance with Terminology D4092E456.
4. Summary of Test Method
4.1 This test method covers the determination of the viscoelastic properties of a plastic material using dynamic mechanical
techniques in tension. A test specimen of rectangular cross section is tested in dynamic tension. The specimen is gripped
longitudinally between two clamps. The specimen is placed in mechanical linear tensile displacement at fixed frequencies with a
linear temperature variation or variable frequencies at isothermal conditions. The elastic moduli or loss moduli, or both, of the
polymeric material system are measured in tension.
NOTE 2—The particular method for measurement of the elastic and loss moduli and tan delta depends upon the individual instrument’s operating
principles.
5. Significance and Use
5.1 This test method provides a simple means of characterizing the thermomechanical behavior of plastic materials using very
small amounts of material. The data obtained may be is used for quality control, research and development, as well as the
establishment of optimum processing conditions.
5.2 Dynamic mechanical testing provides a sensitive method for determining thermomechanical characteristics by measuring the
elastic and loss moduli as a function of frequency, temperature, or time. Plots of moduli and tan delta of a material versus these
variables can be used to provide graphical representation indicative of functional properties, effectiveness of cure (thermosetting
resin system), and damping behavior under specified conditions.
5.2.1 Observed data are specific to experimental conditions. Reporting in full (as described in this test method) the conditions
under which the data was obtained is essential to assist users with interpreting the data an reconciling apparent or perceived
discrepancies.
5.3 This test method can be used to assess:
5.3.1 Modulus as a function of temperature,
5.3.2 Modulus as a function of frequency,
5.3.3 The effects of processing treatment, including orientation,
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
D5026 − 23
5.3.4 Relative resin behavioral properties, including cure and damping,
5.3.5 The effects of substrate types and orientation (fabrication) on elastic modulus,
5.3.6 The effects of formulation additives which might affect processability or performance,
5.3.7 The effects of annealing on modulus and glass transition temperature,
5.3.8 The effect of aspect ratio on the modulus of fiber reinforcements, and
5.3.9 The effect of fillers, additives on modulus and glass transition temperature.
5.4 Before proceeding with this test method, reference should be made make reference to the specification of the material being
tested. Any test specimen preparation, conditioning, dimensions, or testing parameters, or combination thereof, covered in the
relevant ASTM materials specification shall take precedence over those mentioned in this test method. If there are no relevant
ASTM material specifications, then the default conditions apply.
6. Interferences
6.1 Since small test specimen geometries are used, it is essential that the specimens be representative of the polymeric material
be
...
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