EN ISO 22088-3:2006
(Main)Plastics - Determination of resistance to environmental stress cracking (ESC) - Part 3: Bent strip method (ISO 22088-3:2006)
Plastics - Determination of resistance to environmental stress cracking (ESC) - Part 3: Bent strip method (ISO 22088-3:2006)
ISO 22088-3:2006 specifies a method for the determination of the environmental stress cracking (ESC) resistance of thermoplastics when they are subjected to a fixed flexural strain in the presence of chemical agents.
ESC is indicated by the change of a suitably chosen indicative property of specimens that have been strained for a defined time in the environment. The method of test is suitable for determining the resistance of sheets and of flat test specimens, especially the sensitivity of localized surface regions of specimens, to ESC.
This is essentially a ranking test and is not intended to provide data to be used for design or performance prediction.
For a constant strain test, refer to ISO 22088-5. For a constant load test, refer to ISO 22088-2.
Kunststoffe - Bestimmung der Beständigkeit gegen umgebungsbedingte Spannungsrissbildung (ESC) - Teil 3: Biegestreifenverfahren (ISO 22088-3:2006)
Dieser Teil von ISO 22088 legt ein Verfahren zur Bestimmung der Beständigkeit gegen umgebungsbedingte Spannungsrissbildung (ESC) von thermoplastischen Kunststoffen fest, wobei sie in Gegenwart von chemisch wirksamen Medien einer konstanten Biegezugdehnung unterworfen werden.
Die ESC wird dabei durch die Änderung einer als geeignet ausgewählten hervorstechenden Eigenschaft von Probekörpern angezeigt, die über eine festgelegte Zeitdauer in der chemischen Umgebung gedehnt wurden. Das Prüfverfahren eignet sich zur Bestimmung der Beständigkeit von Folien und flachen Probekörpern gegen umgebungsbedingte Spannungsrissbildung, besonders auch zur Bestimmung der Empfindlichkeit von lokalen Oberflächenbereichen der Probekörper gegen die ESC.
Das Biegestreifenverfahren ist zur Bestimmung der ESC geeignet, die sowohl von Gasen oder Flüssigkeiten verursacht wird als auch von Feststoffen, die migrierende Stoffe enthalten (z. B. polymere Klebstoffe oder weichmacherhaltige Materialien), wenn diese mit einem bestimmten Polymer in Kontakt kommen.
Dieses Verfahren wird bevorzugt zur Bestimmung der Beständigkeit gegen ESC von starren Kunststoffen angewendet, die während der Dauer der Prüfung nur geringe Spannungsrelaxation zeigen.
Bei dem Verfahren handelt es sich im Wesentlichen um eine Rangordnungsprüfung, und es ist nicht zur Lieferung von Daten vorgesehen, die für konstruktive Zwecke oder zur Vorhersage der Gebrauchstauglichkeit zu verwenden sind.
ANMERKUNG Zu einem Verfahren mit konstanter Zugverformung, siehe ISO 22088-5. Zu einem Zeitstandzugversuch, siehe ISO 22088-2.
Plastiques - Détermination de la fissuration sous contrainte dans un environnement donné (ESC) - Partie 3: Méthode de l'éprouvette courbée (ISO 22088-3:2006)
L'ISO 22088-3:2006 spécifie une méthode pour la détermination de la résistance de thermoplastiques à la fissuration sous contrainte dans un environnement donné (ESC) quand ils sont soumis à une contrainte de flexion constante en présence d'agents chimiques.
L'ESC sera figurée par la variation d'une propriété indicative choisie de manière appropriée des éprouvettes qui ont été soumises à la contrainte pendant une durée définie dans l'environnement. La méthode d'essai convient pour déterminer la résistance de plaques et d'éprouvettes planes, en particulier la sensibilité d'une surface localisée d'éprouvettes soumises à l'ESC.
Il s'agit ici essentiellement d'un essai de classement qui n'est pas destiné à fournir des données exploitables pour la conception ou des prévisions de performance.
Pour un essai de déformation constante, voir l'ISO 22088-5. Pour un essai sous contrainte constante, voir l'ISO 22088-2.
Polimerni materiali - Določanje odpornosti proti napetostni koroziji (ESC) - 3. del: Metoda z upognjenim trakom (ISO 22088-3:2006)
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Plastics - Determination of resistance to environmental stress cracking (ESC) - Part 3: Bent strip method (ISO 22088-3:2006)Plastiques - Détermination de la fissuration sous contrainte dans un environnement donné (ESC) - Partie 3: Méthode de l'éprouvette courbée (ISO 22088-3:2006)Kunststoffe - Bestimmung der Beständigkeit gegen umgebungsbedingte Spannungsrissbildung (ESC) - Teil 3: Biegestreifenverfahren (ISO 22088-3:2006)Ta slovenski standard je istoveten z:EN ISO 22088-3:2006SIST EN ISO 22088-3:2006en,fr,de83.080.01Polimerni materiali na splošnoPlastics in generalICS:SLOVENSKI
STANDARDSIST EN ISO 22088-3:200601-december-2006
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN ISO 22088-3August 2006ICS 83.080.01Supersedes EN ISO 4599:1996
English VersionPlastics - Determination of resistance to environmental stresscracking (ESC) - Part 3: Bent strip method (ISO 22088-3:2006)Plastiques - Détermination de la fissuration sous contraintedans un environnement donné (ESC) - Partie 3: Méthodede l'éprouvette courbée (ISO 22088-3:2006)Kunststoffe - Bestimmung der Beständigkeit gegenumgebungsbedingte Spannungsrissbildung (ESC) - Teil 3:Biegestreifenverfahren (ISO 22088-3:2006)This European Standard was approved by CEN on 21 July 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 22088-3:2006: E
Foreword
This document (EN ISO 22088-3:2006) 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 IBN.
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 February 2007, and conflicting national standards shall be withdrawn at the latest by February 2007.
This document supersedes EN ISO 4599:1996.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, 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.
Endorsement notice
The text of ISO 22088-3:2006 has been approved by CEN as EN ISO 22088-3:2006 without any modifications.
Reference numberISO 22088-3:2006(E)© ISO 2006
INTERNATIONAL STANDARD ISO22088-3First edition2006-08-15Plastics —Determination of resistance to environmental stress cracking (ESC) — Part 3: Bent strip method Plastiques — Détermination de la fissuration sous contrainte dans un environnement donné (ESC) — Partie 3: Méthode de l'éprouvette courbée
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ii © ISO 2006 – All rights reserved
ISO 22088-3:2006(E) © ISO 2006 – All rights reserved iiiContents Page Foreword.iv 1 Scope.1 2 Normative references.1 3 Terms and definitions.2 4 Principle.4 5 Apparatus.4 6 Test specimens.5 6.1 Form and dimensions.5 6.2 Preparation.5 6.3 Number.5 7 Conditioning and test conditions.5 7.1 Conditioning.5 7.2 Test temperature.5 7.3 Test medium.5 8 Procedure.5 8.1 Precautions.5 8.2 Mounting the test specimens.5 8.3 Contact with the test environment.6 8.4 Storage in contact with the test environment.6 8.5 Determination of the indicative property.7 9 Expression of results.7 9.1 Calculation.7 9.2 Graphical evaluation.7 10 Precision.8 11 Test report.9 Bibliography.10
ISO 22088-3:2006(E) iv © ISO 2006 – All rights reserved 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. The main task of technical committees is to prepare International Standards. 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 document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 22088-3 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 6, Ageing, chemical and environmental resistance. It cancels and replaces ISO 4599:1986, which has been technically revised. ISO 22088 consists of the following parts, under the general title Plastics — Determination of resistance to environmental stress cracking (ESC): ⎯ Part 1: General guidance ⎯ Part 2: Constant tensile load method (replacement of ISO 6252:1992) ⎯ Part 3: Bent strip method (replacement of ISO 4599:1986) ⎯ Part 4: Ball or pin impression method (replacement of ISO 4600:1992) ⎯ Part 5: Constant tensile deformation method (new test method) ⎯ Part 6: Slow strain rate method (new test method)
INTERNATIONAL STANDARD ISO 22088-3:2006(E) © ISO 2006 – All rights reserved 1Plastics — Determination of resistance to environmental stress cracking (ESC) — Part 3: Bent strip method 1 Scope This part of ISO 22088 specifies a method for the determination of the environmental stress cracking (ESC) resistance of thermoplastics when they are subjected to a fixed flexural strain in the presence of chemical agents. ESC is indicated by the change of a suitably chosen indicative property of specimens that have been strained for a defined time in the environment. The method of test is suitable for determining the resistance of sheets and of flat test specimens, especially the sensitivity of localized surface regions of specimens, to ESC. The bent strip method is suitable for the determination of ESC caused by gases and liquids as well as solids containing migrating substances (e.g. polymeric adhesives and materials containing plasticizers) in contact with a specific polymer. Preferably, this method is used to determine the ESC resistance of rigid plastics that exhibit only moderate stress relaxation during the time of the test. This is essentially a ranking test and is not intended to provide data to be used for design or performance prediction. NOTE For a constant-strain test, refer to ISO 22088-5. For a constant-load test, refer to ISO 22088-2. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 178, Plastics — Determination of flexural properties ISO 179-1, Plastics — Determination of Charpy impact properties — Part 1: Non-instrumented impact test ISO 527-2, Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and extrusion plastics ISO 2818, Plastics — Preparation of test specimens by machining ISO 22088-1:2006, Plastics — Determination of resistance to environmental stress cracking (ESC) — Part 1: General guidance
ISO 22088-3:2006(E) 2 © ISO 2006 – All rights reserved 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 flexural strain εx nominal value of the strain in the tensile surface of a flat test specimen of thickness h, bent over the segment of a circle with radius r, calculated from the equation x2hrhε=+ NOTE See Figure 1.
Key 1 clamps 2 test specimen: tensile surface in contact with test medium
compressive surface in contact with form 3 form h thickness of test specimen r radius of form εx nominal strain in tensile surface Figure 1 — Test specimen with defined strain in the tensile surface 3.2 strain value one of a series of strain levels applied to successive test specimens during exposure 3.3 strain series a number of strain values, including zero NOTE 1 Normally, the results of the mechanical test on test specimens with zero applied strain are equivalent whether determined in air or in a chemical test medium. If the property measured after exposure to the test medium at zero strain is different from that after exposure in air at zero strain, embrittlement or softening by the test medium should be suspected. In some cases, relief of stresses imparted during specimen preparation such as by injection-moulding or machining can contribute to differences in re
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