EN ISO 6721-1:2011
(Main)Plastics - Determination of dynamic mechanical properties - Part 1: General principles (ISO 6721-1:2011)
Plastics - Determination of dynamic mechanical properties - Part 1: General principles (ISO 6721-1:2011)
The various parts of ISO 6721 specify methods for the determination of the dynamic mechanical properties of rigid plastics within the region of linear viscoelastic behaviour. ISO 6721-1:2011 is an introductory section which includes the definitions and all aspects that are common to the individual test methods described in the subsequent parts.
Different deformation modes may produce results that are not directly comparable. For example, tensile vibration results in a stress which is uniform across the whole thickness of the specimen, whereas flexural measurements are influenced preferentially by the properties of the surface regions of the specimen.
Values derived from flexural-test data will be comparable to those derived from tensile-test data only at strain levels where the stress-strain relationship is linear and for specimens which have a homogeneous structure.
Kunststoffe - Bestimmung dynamisch-mechanischer Eigenschaften - Teil 1: Allgemeine Grundlagen (ISO 6721-1:2011)
Die verschiedenen Teile von ISO 6721 legen Verfahren zur Bestimmung der dynamisch-mechanischen
Eigenschaften von steifen Kunststoffen im Bereich des linear-viskoelastischen Verhaltens fest. Dieser Teil von
ISO 6721 ist ein Einführungsteil, der die Definitionen und alle Gesichtspunkte enthält, die für die einzelnen, in
den folgenden Teilen beschriebenen Prüfverfahren gültig sind.
Unterschiedliche Deformationsarten können Ergebnisse hervorrufen, die nicht direkt vergleichbar sind. Zum
Beispiel ergeben Zugschwingungen Spannungen, die über die gesamte Dicke des Probekörpers gleichförmig
sind, während Biege-Messungen bevorzugt durch die Eigenschaften von Oberflächen-Gebieten des Probekörpers
beeinflusst sind.
Eigenschaftswerte aus Biegeprüfungen sind nur mit solchen aus Zugprüfungen vergleichbar in Spannungsbereichen,
in denen die Spannungs-Dehnungs-Beziehung linear ist, und für Probekörper mit homogener
Struktur.
Plastiques - Détermination des propriétés mécaniques dynamiques - Partie 1: Principes généraux (ISO 6721-1:2011)
Les différentes parties de l'ISO 6721 spécifient des méthodes pour la détermination des propriétés mécaniques dynamiques de plastiques rigides dans le domaine de comportement viscoélastique linéaire. L'ISO 6721-1:2011 établit des principes généraux incluant les définitions et tous les aspects communs à toutes les méthodes individuelles, décrites dans les parties subséquentes.
Les différents modes de déformation peuvent produire des résultats qui ne sont pas directement comparables. Par exemple, la vibration en traction conduit à une contrainte uniforme dans toute l'épaisseur de l'éprouvette, alors que les mesurages en flexion sont influencés préférentiellement par les propriétés des couches superficielles de l'éprouvette.
Les valeurs découlant des données de l'essai de flexion seront comparables à celles découlant des données de l'essai de traction seulement aux niveaux de déformation pour lesquels la relation contrainte-déformation est linéaire, et pour des éprouvettes de structure homogène.
Polimerni materiali - Ugotavljanje dinamičnih mehanskih lastnosti - 1. del: Splošna načela (ISO 6721-1:2011)
Različni deli ISO 6721 določajo metode za ugotavljanje dinamičnih mehanskih lastnosti togih polimernih materialov v okviru linearnega viskoelastičnega obnašanja. Ta del ISO 6721 je uvodni del, ki vključuje definicije in vse vidike, ki so skupni posameznim preskusnim metodam, opisanim v naslednjih delih. Različni načini deformacije lahko privedejo do rezultatov, ki niso neposredno primerljivi. Natezna vibracija ima na primer za posledico napetost, ki je enakomerna po vsej debelini vzorca, na upogibne meritve pa vplivajo lastnosti površinskih predelov vzorca. Vrednosti, dobljene iz podatkov upogibnega preskusa, so primerljive z vrednostmi, dobljenimi iz podatkov nateznega preskusa, le pri ravneh deformacije, pri katerih je razmerje med napetostjo in deformacijo linearno, in pri vzorcih s homogeno strukturo.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2012
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SIST EN ISO 6721-1:2003
SIST EN ISO 6721-1:2003/kprA1:2010
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Plastics - Determination of dynamic mechanical properties - Part 1: General principles
(ISO 6721-1:2011)
Kunststoffe - Bestimmung dynamisch-mechanischer Eigenschaften - Teil 1: Allgemeine
Grundlagen (ISO 6721-1:2011)
Plastiques - Détermination des propriétés mécaniques dynamiques - Partie 1: Principes
généraux (ISO 6721-1:2011)
Ta slovenski standard je istoveten z: EN ISO 6721-1:2011
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 6721-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2011
ICS 83.080.01 Supersedes EN ISO 6721-1:2002
English Version
Plastics - Determination of dynamic mechanical properties - Part
1: General principles (ISO 6721-1:2011)
Plastiques - Détermination des propriétés mécaniques Kunststoffe - Bestimmung dynamisch-mechanischer
dynamiques - Partie 1: Principes généraux (ISO 6721- Eigenschaften - Teil 1: Allgemeine Grundlagen (ISO 6721-
1:2011) 1:2011)
This European Standard was approved by CEN on 14 May 2011.
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-CENELEC 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-CENELEC Management Centre has the same
status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, 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: Avenue Marnix 17, B-1000 Brussels
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6721-1:2011: E
worldwide for CEN national Members.
Contents Page
Foreword .3
Foreword
This document (EN ISO 6721-1:2011) 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 November 2011, and conflicting national standards shall be withdrawn
at the latest by November 2011.
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 6721-1:2002.
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, Croatia, 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 6721-1:2011 has been approved by CEN as a EN ISO 6721-1:2011 without any modification.
INTERNATIONAL ISO
STANDARD 6721-1
Third edition
2011-05-15
Plastics — Determination of dynamic
mechanical properties —
Part 1:
General principles
Plastiques — Détermination des propriétés mécaniques dynamiques —
Partie 1: Principes généraux
Reference number
ISO 6721-1:2011(E)
©
ISO 2011
ISO 6721-1:2011(E)
© ISO 2011
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electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
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ii © ISO 2011 – All rights reserved
ISO 6721-1:2011(E)
Contents Page
Foreword .iv
Introduction.vi
1 Scope.1
2 Normative references.1
3 Terms and definitions .2
4 Principle .8
5 Test apparatus .10
5.1 Type .10
5.2 Mechanical, electronic and recording systems .10
5.3 Temperature-controlled enclosure .10
5.4 Gas supply .11
5.5 Temperature-measurement device.11
5.6 Devices for measuring test specimen dimensions.11
6 Test specimens.11
6.1 General .11
6.2 Shape and dimensions .11
6.3 Preparation.11
7 Number of test specimens .11
8 Conditioning .12
9 Procedure.12
9.1 Test atmosphere.12
9.2 Measurement of specimen cross-section.12
9.3 Mounting the test specimens.12
9.4 Varying the temperature .12
9.5 Varying the frequency.13
9.6 Varying the dynamic-strain amplitude .13
10 Expression of results.13
11 Precision .13
12 Test report.14
Annex A (informative) Resonance curves.15
Annex B (informative) Deviations from linear behaviour.19
Bibliography.20
ISO 6721-1:2011(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
Draft International Standards adopted by the technical committees are circulated to the member bodies for
voting. Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
Attention is drawn to the possibility that some of the elements of this part of ISO 6721 may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 6721-1 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 2, Mechanical
properties.
This third edition cancels and replaces the second edition (ISO 6721-1:2001), of which it constitutes a minor
revision involving the following changes:
⎯ a new subclause (9.6), covering the case when the dynamic-strain amplitude is varied, has been added to
the procedure clause;
⎯ the expression of results clause (Clause 10) and the test report clause (Clause 12) have been modified
accordingly [Clause 10 by the addition of a new paragraph (the third) and Clause 12 by the addition of a
new item, item n)].
ISO 6721 consists of the following parts, under the general title Plastics — Determination of dynamic
mechanical properties:
⎯ Part 1: General principles
⎯ Part 2: Torsion-pendulum method
⎯ Part 3: Flexural vibration — Resonance-curve method
⎯ Part 4: Tensile vibration — Non-resonance method
⎯ Part 5: Flexural vibration — Non-resonance method
⎯ Part 6: Shear vibration — Non-resonance method
⎯ Part 7: Torsional vibration — Non-resonance method
⎯ Part 8: Longitudinal and shear vibration — Wave-propagation method
⎯ Part 9: Tensile vibration — Sonic-pulse propagation method
⎯ Part 10: Complex shear viscosity using a parallel-plate oscillatory rheometer
iv © ISO 2011 – All rights reserved
ISO 6721-1:2011(E)
⎯ Part 11: Glass transition temperature
⎯ Part 12: Compressive vibration — Non-resonance method
ISO 6721-1:2011(E)
Introduction
The methods specified in the first nine parts of ISO 6721 can be used for determining storage and loss moduli
of plastics over a range of temperatures or frequencies by varying the temperature of the specimen or the
frequency of oscillation. Plots of the storage or loss moduli, or both, are indicative of viscoelastic
characteristics of the specimen. Regions of rapid changes in viscoelastic properties at particular temperatures
or frequencies are normally referred to as transition regions. Furthermore, from the temperature and
frequency dependencies of the loss moduli, the damping of sound and vibration of polymer or metal-polymer
systems can be estimated.
Apparent discrepancies may arise in results obtained under different experimental conditions. Without
changing the observed data, reporting in full (as described in the various parts of ISO 6721) the conditions
under which the data were obtained will enable apparent differences observed in different studies to be
reconciled.
The definitions of complex moduli apply exactly only to sinusoidal oscillations with constant amplitude and
constant frequency during each measurement. On the other hand, measurements of small phase angles
...
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