Reference number
ISO 6721-8:2019
International Standard
ISO 6721-8:2019
Plastics — Determination of dynamic mechanical properties — Part 8: Longitudinal and shear vibration — Wave-propagation method
Edition 2
2019-04
Read sample
ISO 6721-8:2019
74986
Published (Edition 2, 2019)
This publication was last reviewed and confirmed in 2024. Therefore this version remains current.

ISO 6721-8:2019

ISO 6721-8:2019
74986
Language
Format
CHF 63
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Abstract

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.

General information

  •  : Published
     : 2019-04
    : International Standard confirmed [90.93]
  •  : 2
     : 11
  • ISO/TC 61/SC 5
    83.080.01 
  • RSS updates

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