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ISO 6721-2:2008

Plastics -- Determination of dynamic mechanical properties -- Part 2: Torsion-pendulum method

General information
Withdrawn from 29.04.2019
Directives or regulations
None
Standard history
Status
Date
Type
Name
29.04.2019
Main
26.05.2008
Main
Main
ISO 6721-2:1994
Corrigendum
ISO 6721-2:1994/Cor 1:1995
ISO 6721-2:2008 specifies two methods (A and B) for determining the linear dynamic mechanical properties of plastics, i.e. the storage and loss components of the torsional modulus, as a function of temperature, for small deformations within the frequency range from 0,1 Hz to 10 Hz. The temperature dependence of these properties, measured over a sufficiently broad range of temperatures (for example from -50 °C to +150 °C for the majority of commercially available plastics), gives information on the transition regions (for example the glass transition and the melting transition) of the polymer. It also provides information concerning the onset of plastic flow. The two methods described are not applicable to non-symmetrical laminates (see ISO 6721-3, Plastics - Determination of dynamic mechanical properties - Part 3: Flexural vibration - Resonance-curve method). The methods are not suitable for testing rubbers, for which the user is referred to ISO 4664-2, Rubber, vulcanized or thermoplastic - Determination of dynamic properties - Part 2: Torsion pendulum methods at low frequencies.
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