Plastics — Determination of dynamic mechanical properties — Part 9: Tensile vibration — Sonic-pulse propagation method

This document describes a pulse propagation method for determining the storage component of the complex tensile modulus E' of polymers at discrete frequencies typically in the range 3 kHz to 10 kHz. 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 10 kHz. With materials having a higher loss, significant errors in velocity measurement are introduced through decay of amplitude. The method allows measurements to be made on thin films or fine fibres and long specimens, typically tapes of 300 mm × 5 mm × 0,1 mm or fibres of 300 mm × 0,1 mm (diameter). This method may not be suitable for cellular plastics, composite plastics and multilayer products.

Plastiques — Détermination des propriétés mécaniques dynamiques — Partie 9: Vibration en traction — Méthode de propagation de signaux acoustiques

General Information

Status
Published
Publication Date
10-Apr-2019
Current Stage
9020 - International Standard under periodical review
Start Date
15-Jan-2024
Completion Date
15-Jan-2024
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ISO 6721-9:2019 - Plastics -- Determination of dynamic mechanical properties
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Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 6721-9
Second edition
2019-04
Plastics — Determination of dynamic
mechanical properties —
Part 9:
Tensile vibration — Sonic-pulse
propagation method
Plastiques — Détermination des propriétés mécaniques
dynamiques —
Partie 9: Vibration en traction — Méthode de propagation de signaux
acoustiques
Reference number
ISO 6721-9:2019(E)
©
ISO 2019

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ISO 6721-9:2019(E)

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© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
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Published in Switzerland
ii © ISO 2019 – All rights reserved

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ISO 6721-9:2019(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Test device . 2
5.1 Apparatus . 2
5.2 Transducers . 2
5.3 Transducer drive unit . 2
5.4 Pulse arrival time measuring equipment . 3
5.5 Temperature measurement and control equipment . 3
6 Test specimens. 3
6.1 General . 3
6.2 Shape and dimensions . 3
6.3 Preparation . 3
7 Number of specimens . 3
8 Conditioning . 3
9 Procedure.
...

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