BS EN ISO 6721-2:2019 - Plastics. Determination of dynamic mechanical properties. Torsion-pendulum method

BS EN ISO 6721-2:2019

Plastics. Determination of dynamic mechanical properties. Torsion-pendulum method

Status : Current   Published : June 2019



This document 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 most 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). The methods are not suitable for testing rubbers, for which the user is referred to ISO 4664-2.

Standard NumberBS EN ISO 6721-2:2019
TitlePlastics. Determination of dynamic mechanical properties. Torsion-pendulum method
Publication Date14 June 2019
Normative References(Required to achieve compliance to this standard)ISO 6721-1
Informative References(Provided for Information)ISO 4664-2, ISO 6721-3
ReplacesBS EN ISO 6721-2:2008
International RelationshipsEN ISO 6721-2:2019,ISO 6721-2:2019
Draft Superseded By18/30356006 DC
DescriptorsTorsion testing, Plastics and rubber technology, Test equipment, Testing conditions, Torsion pendulums, Specimen preparation, Mechanical testing, Polymers, Error correction, Precision, Mechanical properties of materials, Modulus of elasticity, Plastics, Mathematical calculations, Test specimens, Dynamic testing
Title in FrenchPlastiques. Détermination des propriétés mécaniques dynamiques Méthode au pendule de torsion
Title in GermanKunststoffe. Bestimmung dynamisch-mechanischer Eigenschaften Torsionspendel-Verfahren
ISBN978 0 580 97457 1
File Size794 KB

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