EN ISO 6721-2:2008

Plastics - Determination of dynamic mechanical properties - Part 2: Torsion-pendulum method (ISO 6721-2:2008)

ISO 6721-2:2008 specifies two methods (A and B) for determining the linear dynamic mechanical properties of plastics, i.e. the storage and loss components of the torsional modulus, as a function of temperature, for small deformations within the frequency range from 0,1 Hz to 10 Hz.
The temperature dependence of these properties, measured over a sufficiently broad range of temperatures (for example from -50 °C to +150 °C for the majority of commercially available plastics), gives information on the transition regions (for example the glass transition and the melting transition) of the polymer. It also provides information concerning the onset of plastic flow. The two methods described are not applicable to non-symmetrical laminates (see ISO 6721‑3, Plastics — Determination of dynamic mechanical properties — Part 3: Flexural vibration — Resonance-curve method). The methods are not suitable for testing rubbers, for which the user is referred to ISO 4664‑2, Rubber, vulcanized or thermoplastic — Determination of dynamic properties — Part 2: Torsion pendulum methods at low frequencies.

Kunststoffe - Bestimmung dynamisch-mechanischer Eigenschaften - Teil 2: Torsionspendel-Verfahren (ISO 6721-2:2008)

Dieser Teil von ISO 6721 legt zwei Verfahren (A und B) fest, um die linearen dynamisch mechanischen Eigenschaften von Kunststoffen zu bestimmen, und zwar die Speicher  und Verlustkomponenten des Torsionsmoduls als Funktion der Temperatur für kleine Verformungen im Frequenzbereich von 0,1 Hz bis 10 Hz.
Die Temperaturabhängigkeit dieser Größen, ermittelt in einem ausreichend weiten Temperaturbereich (zum Beispiel für die Mehrzahl der kommerziell erhältlichen Kunststoffe von - 50 °C bis +150 °C), liefert Informationen zu den Übergangsbereichen (zum Beispiel für den Übergang (glasartig gummiartig) oder den Schmelzübergang) des Kunststoffs. Außerdem werden Informationen zum Beginn des plastischen Fließens angegeben. Die beschriebenen beiden Verfahren sind nicht anwendbar auf unsymmetrische Laminate (siehe ISO 6721 3, Plastics - Determination of dynamic mechanical properties - Part 3: Flexural vibration - Resonance curve method). Die Verfahren sind nicht geeignet zur Prüfung von Elastomeren. Hierzu wird verwiesen auf ISO 4664 2, Rubber, vulcanized or thermoplastic - Determination of dynamic properties - Part 2: Torsion pendulum methods at low frequencies.

Plastiques - Détermination des propriétés mécaniques dynamiques - Partie 2: Méthode au pendule de torsion (ISO 6721-2:2008)

L'ISO 6721-2:2008 spécifie deux méthodes (A et B) pour la détermination des propriétés mécaniques dynamiques linéaires, telles que les composantes de conservation et de perte du module en torsion, des plastiques dans le domaines des petites déformations en fonction de la température dans la gamme de fréquences de 0,1 Hz à 10 Hz.
La dépendance thermique de ces propriétés, mesurée sur une gamme de températures suffisamment large (par exemple de -50 °C à +150 °C pour la majorité des plastiques commercialement disponibles), donne des informations sur les zones de transition (par exemple transition vitreuse ou fusion) d'un polymère. Elle donne aussi une information au sujet du début de l'écoulement d'un plastique. Les deux méthodes décrites ne sont pas applicables aux stratifiés asymétriques au sujet desquels il y a lieu de se reporter à l'ISO 6721-3, Plastiques — Détermination des propriétés mécaniques dynamiques — Partie 3: Vibration en flexion — Méthode en résonance. Les méthodes ne s'appliquent pas non plus pour l'essai de caoutchoucs au sujet desquels il convient de se reporter à l'ISO 4664-2, Caoutchouc vulcanisé ou thermoplastique — Détermination des propriétés dynamiques — Partie 2: Méthodes du pendule de torsion à basses fréquences.

Polimerni materiali - Določevanje dinamičnih mehanskih lastnosti - 2. del: Metoda s torzijskim nihalom (ISO 6721-2:2008)

General Information

• Status: Withdrawn
• Publication Date: 31-May-2008
• Withdrawal Date: 28-May-2019
• ICS: 83.080.01 - Plastics in general
• Technical Committee: CEN/TC 249 - Plastics
• Drafting Committee: CEN/TC 249 - Plastics
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 29-May-2019
• Ref Project: SIST EN ISO 6721-2:2008 - Plastics - Determination of dynamic mechanical properties - Part 2: Torsion-pendulum method (ISO 6721-2:2008)

Relations

• Replaces: EN ISO 6721-2:1996 - Plastics - Determination of dynamic mechanical properties - Part 2: Torsion-pendulum method (ISO 6721-2:1994, including Technical Corrigendum 1:1995)
• Effective Date: 22-Dec-2008
• Replaced By: EN ISO 6721-2:2019 - Plastics - Determination of dynamic mechanical properties - Part 2: Torsion-pendulum method (ISO 6721-2:2019)
• Effective Date: 23-Jan-2017

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 6721-2:2008
01-september-2008
1DGRPHãþD
SIST EN ISO 6721-2:1999
3ROLPHUQLPDWHULDOL'RORþHYDQMHGLQDPLþQLKPHKDQVNLKODVWQRVWLGHO0HWRGD
VWRU]LMVNLPQLKDORP,62
Plastics - Determination of dynamic mechanical properties - Part 2: Torsion-pendulum
method (ISO 6721-2:2008)
Kunststoffe - Bestimmung dynamisch mechanischer Eigenschaften - Teil 2:
Torsionspendel-Verfahren (ISO 6721-2:2008)
Plastiques - Détermination des propriétés mécaniques dynamiques - Partie 2: Méthode
au pendule de torsion (ISO 6721-2:2008)
Ta slovenski standard je istoveten z: EN ISO 6721-2:2008
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
SIST EN ISO 6721-2:2008 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
EN ISO 6721-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2008
ICS 83.080.01 Supersedes EN ISO 6721-2:1996
English Version
Plastics - Determination of dynamic mechanical properties - Part
2: Torsion-pendulum method (ISO 6721-2:2008)
Plastiques - Détermination des propriétés mécaniques Kunststoffe - Bestimmung dynamisch mechanischer
dynamiques - Partie 2: Méthode au pendule de torsion (ISO Eigenschaften - Teil 2: Torsionspendel-Verfahren (ISO
6721-2:2008) 6721-2:2008)
This European Standard was approved by CEN on 18 May 2008.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6721-2:2008: E
worldwide for CEN national Members.

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EN ISO 6721-2:2008 (E)
Contents Page
Foreword.3

2

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EN ISO 6721-2:2008 (E)
Foreword
This document (EN ISO 6721-2:2008) has been prepared by Technical Committee ISO/TC 61 “Plastics” in
collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by December 2008, and conflicting national standards shall be withdrawn
at the latest by December 2008.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 6721-2:1996.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 6721-2:2008 has been approved by CEN as a EN ISO 6721-2:2008 without any modification.

3

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INTERNATIONAL ISO
STANDARD 6721-2
Second edition
2008-06-01


Plastics — Determination of dynamic
mechanical properties —
Part 2:
Torsion-pendulum method
Plastiques — Détermination des propriétés mécaniques dynamiques —
Partie 2: Méthode au pendule de torsion




Reference number
ISO 6721-2:2008(E)
©
ISO 2008

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ISO 6721-2:2008(E)
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