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Full Description

1.1 This test method covers the use of dynamic mechanical instrumentation for gathering and reporting the visco-elastic 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 data generated, using three-point bending techniques, may be used to identify the thermomechanical properties of a plastics material or composition using a variety of dynamic mechanical instruments.

1.2 This test method is intended to provide means for determining the modulus as a function of temperature for a wide variety of plastics materials using nonresonant forced-vibration techniques, in accordance with 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 Due to possible instrumentation compliance, the data generated are intended to indicate relative and not necessarily absolute property values.

1.6 Test data obtained by this test method are relevant and appropriate for use in engineering design.

1.7 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

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.

Note 1 - There is no similar or equivalent ISO standard.

 

Document History

  1. ASTM D5023-15


    Standard Test Method for Plastics: Dynamic Mechanical Properties: In Flexure (Three-Point Bending)

    • Most Recent
  2. ASTM D5023-07


    Standard Test Method for Plastics: Dynamic Mechanical Properties: In Flexure (Three-Point Bending)

    • Historical Version
  3. ASTM D5023-01


    Standard Test Method for Measuring the Dynamic Mechanical Properties: In Flexure (Three-Point Bending)

    • Historical Version
  4. ASTM D5023-99

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    Standard Test Method for Measuring the Dynamic Mechanical Properties: In Flexure (Three-Point Bending)

    • Historical Version