ISO 6721-2:2008
Plastics - Determination of dynamic mechanical properties - Part 2: Torsion-pendulum method
- Standard No.
- ISO 6721-2:2008
- Release Date
- 2008
- Published By
- International Organization for Standardization (ISO)
- Status
- Replace By
- ISO 6721-2:2019
- Latest
- ISO 6721-2:2019
- Scope
- This part of ISO 6721 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 Iow frequencies.
ISO 6721-2:2008 history
- 2019 ISO 6721-2:2019 Plastics — Determination of dynamic mechanical properties — Part 2: Torsion-pendulum method
- 2008 ISO 6721-2:2008 Plastics - Determination of dynamic mechanical properties - Part 2: Torsion-pendulum method
- 1995 ISO 6721-2:1994/Cor 1:1995 Plastics - Determination of dynamic mechanical properties - Part 2: Torsion-pendulum method; Technical Corrigendum 1
- 1994 ISO 6721-2:1994 Plastics - Determination of dynamic mechanical properties - Part 2: Torsion-pendulum method
