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Norm

ISO 6721-4:2019

Issue date: 2019 05 02

Plastics — Determination of dynamic mechanical properties — Part 4: Tensile vibration — Non-resonance method

This document describes a forced, non-resonance method for determining the components of the tensile complex modulus E* of polymers at frequencies typically in the range ...
Valid
Publisher:
International Organization for Standardization
Format:
Digital | 9 Pages
Language:
English

This document describes a forced, non-resonance method for determining the components of the tensile complex modulus E* of polymers at frequencies typically in the range 0,01 Hz to 100 Hz.

NOTE Higher frequency measurements can be made, but significant errors in the dynamic properties measured are likely to result (see 10.2.2 and 10.2.3).

The method is suitable for measuring dynamic storage moduli in the range 0,01 GPa to 5 GPa. Although materials with moduli outside this range can be studied, alternative modes of deformation are intended to be used for higher accuracy [i.e. a shear mode for G' < 0,01 GPa (see ISO 6721-6) and a flexural mode for E' > 5 GPa (see ISO 6721-3 or ISO 6721-5)].

This method is particularly suited to the measurement of loss factors and can therefore be conveniently used to study the variation of dynamic properties with temperature and frequency through most of the glass-rubber relaxation region (see ISO 6721-1). The availability of data determined over wide ranges of both frequency and temperature enables master plots to be derived, using frequency-temperature shift procedures, which display dynamic properties over an extended frequency range at different temperatures.

ISO 6721-4:2019
2019 05 02
Plastics — Determination of dynamic mechanical properties — Part 4: Tensile vibration — Non-resonanc...
Norm
ISO 6721-4:2008
2008 04 16
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Norm
ISO 6721-4:1994
1994 11 03
Plastics — Determination of dynamic mechanical properties — Part 4: Tensile vibration — Non-resonanc...
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ISO 537:1989
1989 11 30
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ISO 6721:1983
1983 09 01
Plastics — Determination of damping properties and complex modulus by bending vibration
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ISO 537:1980
1980 03 01
Plastics — Testing with the torsion pendulum
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