ISO 6721-4:2019

Plastics — Determination of dynamic mechanical properties — Part 4: Tensile vibration — Non-resonance method

This document describes a forced, non-resonance method for determining the components of the tensile complex modulus E* of polymers at frequencies typically in the range 0,01 Hz to 100 Hz. NOTE Higher frequency measurements can be made, but significant errors in the dynamic properties measured are likely to result (see 10.2.2 and 10.2.3). The method is suitable for measuring dynamic storage moduli in the range 0,01 GPa to 5 GPa. Although materials with moduli outside this range can be studied, alternative modes of deformation are intended to be used for higher accuracy [i.e. a shear mode for G′ 5 GPa (see ISO 6721-3 or ISO 6721-5)]. This method is particularly suited to the measurement of loss factors and can 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 enables master plots to be derived, using frequency-temperature shift procedures, which display dynamic properties over an extended frequency range at different temperatures.

Plastiques — Détermination des propriétés mécaniques dynamiques — Partie 4: Vibration en traction — Méthode hors résonance

General Information

• Status: Published
• Publication Date: 01-May-2019
• ICS: 83.080.01 - Plastics in general
• Technical Committee: ISO/TC 61/SC 5 - Physical-chemical properties
• Drafting Committee: ISO/TC 61/SC 5/WG 8 - Thermal analysis
• Current Stage: 9020 - International Standard under periodical review
• Start Date: 15-Jan-2024
• Completion Date: 15-Jan-2024

Relations

• Revises: ISO 6721-4:2008 - Plastics — Determination of dynamic mechanical properties — Part 4: Tensile vibration — Non-resonance method
• Effective Date: 28-Jan-2017

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 6721-4
Third edition
2019-05
Plastics — Determination of dynamic
mechanical properties —
Part 4:
Tensile vibration — Non-resonance
method
Plastiques — Détermination des propriétés mécaniques
dynamiques —
Partie 4: Vibration en traction — Méthode hors résonance
Reference number
ISO 6721-4:2019(E)
©
ISO 2019

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ISO 6721-4:2019(E)

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ii © ISO 2019 – All rights reserved

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ISO 6721-4:2019(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Test device . 2
5.1 Loading assembly . 2
5.1.1 General. 2
5.1.2 Clamps . 2
5.1.3 Transducers. 2
5.2 Electronic data-processing equipment . 2
5.3 Temperature measurement and control . 2
5.4 Devices for measuring test specimen dimensions . 3
6 Test specimens. 3
6.1 General . 3
6.2 Shape and dimensions . 3
6.3 Preparation . 4
7 Number of specimens . 4
8 Conditioning .
...