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  • BSI
    BS ISO 6721-8:2019 Plastics. Determination of dynamic mechanical properties - Longitudinal and shear vibration. Wave-propagation method
    Edition: 2019
    $313.97
    / user per year

Description of BS ISO 6721-8:2019 2019

This document describes an ultrasonic wave propagation method for determining the storage components of the longitudinal complex modulus L* and the shear complex modulus G* of polymers at discrete frequencies typically in the range 0,5 MHz to 5 MHz. The method is suitable for measuring materials with storage moduli in the range 0,01 GPa to 200 GPa and with loss factors below 0,1 at around 1 MHz. With materials that have a higher loss, significant errors in velocity measurement are introduced through waveform distortion and can only be reduced using procedures that are outside the scope of this document.

The method allows measurements to be made on small specimens, typically 50 mm × 20 mm × 5 mm, or small regions of larger specimens or sheets. It is therefore possible to obtain information on the homogeneity or anisotropy (see 10.5) of modulus in a specimen.



Standard NumberBS ISO 6721-8:2019
TitlePlastics. Determination of dynamic mechanical properties - Longitudinal and shear vibration. Wave-propagation method
StatusConfirmed
Publication Date2019-04-16
ReplacesBS 2782-3:Method 323E:1997
Identical National Standard OfISO 6721-8
DescriptorsPolymers, Wave properties and phenomena, Test equipment, Shear stress, Test specimens, Plastics and rubber technology, Plastics, Ultrasonic testing, Mechanical measurement, Wave propagation
ICS83.080.01 Plastics in general
CommitteePRI/21
ISBN978 0 580 52276 5
PublisherBSI
Pages18

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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