BS ISO 6721-7:2019 Plastics. Determination of dynamic mechanical properties. Torsional vibration. Non-resonance method

BS ISO 6721-7:2019

Plastics. Determination of dynamic mechanical properties. Torsional vibration. Non-resonance method

Status : Current   Published : April 2019

Format
PDF

Format
HARDCOPY



What is this standard about?

This document describes a torsional, non-resonance method for determining the components of the shear complex modulus G* of solid polymers in the form of bars or rods at frequencies typically in the range 0,001 Hz to 100 Hz. Higher-frequency measurements can be made, but significant errors in the dynamic properties measured are likely to result. The method is suitable for measuring dynamic storage moduli ranging from about 10 MPa, which is typical of values obtained for stiff rubbers, to values of about 10 GPa which are representative of fibre-reinforced plastics. Although materials with moduli less than 10 MPa can be studied, more accurate measurements of their dynamic properties can be made using simple shear (see ISO 6721-6) or torsional deformations of thin layers between parallel plates.

This method is particularly suited to the measurement of loss factors greater than 0,02 and may 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 enable master plots to be derived, using frequency-temperature shift procedures, which display dynamic properties over an extended frequency range at different temperatures.




Standard NumberBS ISO 6721-7:2019
TitlePlastics. Determination of dynamic mechanical properties. Torsional vibration. Non-resonance method
StatusCurrent
Publication Date18 April 2019
Normative References(Required to achieve compliance to this standard)ISO 6721-1
Informative References(Provided for Information)ISO 6721-2, ISO 6721-6
International RelationshipsISO 6721-7:2019
Draft Superseded By18/30356018 DC
DescriptorsComponents, Vibration, Plastics, Bars (materials), Polymers
ICS83.080.01
Title in FrenchPlastiques. Détermination des propriétés mécaniques dynamiques Vibration en torsion. Méthode hors résonance
CommitteePRI/21
ISBN978 0 580 97461 8
PublisherBSI
FormatA4
DeliveryYes
Pages18
File Size674 KB
Price£130.00


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