ASTM D5279-08

Standard Test Method for Plastics: Dynamic Mechanical Properties: In Torsion

SIGNIFICANCE AND USE
This test method provides a simple means of characterizing the thermomechanical behavior of plastics materials using very small amounts of material. The data obtained may be used for quality control, research and development, and establishment of optimum processing conditions.
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 temperature provide graphical representations indicative of functional properties, effectiveness of cure (thermosetting resin system), and damping behavior under specified conditions.
This test method can be used to assess
The modulus as a function of temperature,
The modulus as a function of frequency,
The effects of processing treatment, including orientation,
Relative resin behavioral properties, including cure and damping,
The effects of substrate types and orientation (fabrication) on elastic modulus, and
The effects of formulation additives that might affect processability or performance.
Before proceeding with this test method, reference should be made 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 materials specifications, then the default conditions apply.
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 specimens molded directly or cut from sheets, plates, or molded shapes. The torsional 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 torsional modulus of plastics as a function of temperature 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—This test method is equivalent to ISO 6721, Part 7.

General Information

• Status: Historical
• Publication Date: 29-Feb-2008
• ICS: 83.080.01 - Plastics in general
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.10 - Mechanical Properties

Relations

• Replaces: ASTM D5279-01 - Standard Test Method for Plastics: Dynamic Mechanical Properties: In Torsion
• Effective Date: 01-Mar-2008
• Referred By: ASTM D4000-23 - Standard Classification System for Specifying Plastic Materials
• Effective Date: 01-Mar-2008
• Referred By: ASTM D6382/D6382M-99(2022) - Standard Practice for Dynamic Mechanical Analysis and Thermogravimetry of Roofing and Waterproofing Membrane Material
• Effective Date: 01-Mar-2008
• Referred By: ASTM D4065-20 - Standard Practice for Plastics: Dynamic Mechanical Properties: Determination and Report of Procedures
• Effective Date: 01-Mar-2008
• Referred By: ASTM D4101-17e1 - Standard Classification System and Basis for Specification for Polypropylene Injection and Extrusion Materials
• Effective Date: 01-Mar-2008
• Referred By: ASTM D8349-21 - Standard Classification System for and Basis of Specifications for Thermoplastic Joining Interface Materials for Creation of Joints Between Different Materials for the Production of End Items or Parts that are Intended to be Disassembled and/or Reassembled
• Effective Date: 01-Mar-2008
• Referred By: ASTM D5418-15 - Standard Test Method for Plastics: Dynamic Mechanical Properties: In Flexure (Dual Cantilever Beam)
• Effective Date: 01-Mar-2008
• Referred By: ASTM D5592-94(2018) - Standard Guide for Material Properties Needed in Engineering Design Using Plastics
• Effective Date: 01-Mar-2008

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: D5279 − 08
StandardTest Method for
1
Plastics: Dynamic Mechanical Properties: In Torsion
This standard is issued under the fixed designation D5279; 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* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This test method covers the use of dynamic mechanical
D618 Practice for Conditioning Plastics for Testing
instrumentation for gathering and reporting the viscoelastic
D4065 Practice for Plastics: Dynamic Mechanical Proper-
properties of thermoplastic and thermosetting resins and com-
ties: Determination and Report of Procedures
posite systems in the form of rectangular specimens molded
D4092 Terminology for Plastics: Dynamic Mechanical
directly or cut from sheets, plates, or molded shapes. The
Properties
torsional data generated may be used to identify the thermo-
mechanical properties of a plastics material or composition.
3. Terminology
1.2 This test method is intended to provide means for
3.1 For definitions applicable to this test method, refer to
determining the torsional modulus of plastics as a function of
Terminology D4092.
temperature using nonresonant forced-vibration techniques, as
3
outlined in Practice D4065. Plots of the elastic (storage), loss
4. Summary of Test Method
(viscous), and complex moduli and tan delta, as a function of
4.1 This test method covers the determination of the shear
frequency, time, or temperature are indicative of significant
modulus of plastics using dynamic mechanical techniques. A
transitions in the thermomechanical performance of the poly-
test specimen of rectangular cross section is tested in dynamic
meric material system.
torsion. The specimen is gripped longitudinally between two
1.3 Thistestmethodisvalidforawiderangeoffrequencies,
clamps. The specimen of known geometry is placed in me-
typically from 0.01 to 100 Hz.
chanical torsional displacement at either a fixed frequency, or
variable frequencies at either isothermal conditions, or with a
1.4 Apparent discrepancies may arise in results obtained
linear temperature increase. The elastic or loss modulus, or
under differing experimental conditions. These apparent differ-
both, of the polymeric material system are measured in torsion.
ences from results observed in another study can usually be
reconciled without changing the observed data by reporting in
5. Significance and Use
full (as described in this test method) the conditions under
5.1 This test method provides a simple means of character-
which the data were obtained.
izing the thermomechanical behavior of plastics materials
1.5 Test data obtained by this test method are relevant and
using very small amounts of material. The data obtained may
appropriate for use in engineering design.
be used for quality control, research and development, and
establishment of optimum processing conditions.
1.6 The values stated in SI units are to be regarded as
standard. 5.2 Dynamic mechanical testing provides a sensitive
method for determining thermomechanical characteristics by
1.7 This standard does not purport to address all of the
measuring the elastic and loss moduli as a function of
safety concerns, if any, associated with its use. It is the
frequency, temperature, or time. Plots of moduli and tan delta
responsibility of the user of this standard to establish appro-
of a material versus temperature provide graphical representa-
priate safety and health practices and determine the applica-
tions indicative of functional properties, effectiveness of cure
bility of regulatory limitations prior to use.
(thermosetting resin system), and damping behavior under
NOTE 1—This test method is equivalent to ISO 6721, Part 7.
specified conditions.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
This test method is under the jurisdiction ofASTM Committee D20 on Plastics contact ASTM Customer Service at [e-mail]. 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 March 1, 2008. Published April 2008. Originally the ASTM website.
3
approved in 1992. Last previous edition approved in 2001 as D5279 - 01. DOI: The particular method for measurement of the elastic and loss moduli and tan
10.1520/D5279-08. delta depends upon the individual instrument’s operating principles.
*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 194
...

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:D5279–01 Designation: D 5279 – 08
Standard Test Method for
1
Plastics: Dynamic Mechanical Properties: In Torsion
This standard is issued under the fixed designation D 5279; 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*
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 specimens molded directly
or cut from sheets, plates, or molded shapes.The torsional 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 torsional modulus of plastics 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.
NOTE1—There is no similar or equivalent ISO standard. 1—This test method is equivalent to ISO 6721, Part 7.
2. Referenced Documents
2
2.1 ASTM Standards:
D 618Practice for Conditioning Plastics and Electrical Insulating Materials for Testing Practice for Conditioning Plastics for
Testing
D 4065Practice for Determining and Reporting Dynamic Mechanical Properties of Plastics Practice for Plastics: Dynamic
Mechanical Properties: Determination and Report of Procedures
3
D 4092Terminology Relating to Dynamic Mechanical Measurements of Plastics Terminology for Plastics: Dynamic
Mechanical Properties
3. Terminology
3.1 For definitions applicable to this test method, refer to Terminology D 4092.
3
4. Summary of Test Method
4.1 This test method covers the determination of the shear modulus of plastics using dynamic mechanical techniques. A test
specimen of rectangular cross section is tested in dynamic torsion. The specimen is gripped longitudinally between two clamps.
The specimen of known geometry is placed in mechanical torsional displacement at either a fixed frequency, or variable
frequencies at either isothermal conditions, or with a linear temperature increase. The elastic or loss modulus, or both, of the
polymeric material system are measured in torsion.
1
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 September 10, 2001. Published November 2001. Originally published as D5279–92. Last previous edition D5279–99.
Current edition approved March 1, 2008. Published April 2008. Originally approved in 1992. Last previous edition approved in 2001 as D5279 - 01.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book ofASTM Standards
, Vol 08.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Annual Book of ASTM Standards, Vol 08.02.
3
The particular method for measurement of the elastic and loss moduli and tan delta depends upon the individual instrument’s operating principles.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Co
...