EN ISO 22088-6:2009

• Abstract:

  ISO 22088-6:2006 describes a procedure for assessing the environmental stress cracking (ESC) susceptibility of polymeric materials in chemical environments by slowly increasing the strain applied to a tensile specimen at a constant rate.; It is applicable to test specimens prepared by moulding and/or machining and can be used to assess the relative ESC susceptibility of a material exposed to different environments or the relative ESC susceptibility of different plastics exposed to a specific environment. ; This is essentially a ranking test and is not intended for the provision of design data.; The principle advantage of the test compared with the test methods described in Parts 2 to 5 of ISO 22088 is the rapidity with which the ESC susceptibility of a particular polymer/environment combination can be assessed.

• Status: Published
• Publication Date: 23-Jun-2009
• Withdrawal Date: 30-Dec-2009
• ICS: 83.080.01 - Plastics in general
• Technical Committee: CEN/TC 249 - Plastics
• Drafting Committee: CEN/TC 249 - Plastics
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 24-Jun-2009
• Due Date: 13-Nov-2009
• Completion Date: 24-Jun-2009
• Ref Project: SIST EN ISO 22088-6:2009 - Plastics - Determination of resistance to environmental stress cracking (ESC) - Part 6: Slow strain rate method (ISO 22088-6:2006)

• Refers: ISO 22088-1:2006 - Plastics — Determination of resistance to environmental stress cracking (ESC) — Part 1: General guidance
• Effective Date: 25-Aug-2026
• Refers: ISO 527-2:1993 - Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and extrusion plastics
• Effective Date: 25-Aug-2026

Overview

EN ISO 22088-6:2009 (ISO 22088-6:2006) specifies the slow strain rate method for assessing the susceptibility of plastics to environmental stress cracking (ESC). The procedure exposes tensile specimens to a defined chemical environment while a low, constant strain rate is applied. The test is primarily a ranking method to compare ESC susceptibility between materials or between environments and is not intended to supply design data.

Key topics and technical requirements

• Test principle: slowly increase strain on a tensile specimen while immersed in a test medium and monitor stress–strain behaviour to detect craze initiation and departure from the inert (air) response.
• Departure criterion: departure is defined objectively - when the derivative (tangent modulus) of the stress–strain curve in the test medium falls to 75% of that in air.
• Specimens: typically use Type 1BA tensile specimens per ISO 527-2; specimens may be moulded or machined.
• Apparatus:
  • Tensile testing machine capable of a constant displacement rate with repeatability (crosshead speed) to ±2%.
  • Load cell accuracy to about ±1%; displacement transducer accuracy to about ±0.4%.
  • Grips with ripple contact to prevent slippage.
  • Inert test chamber to contain specimen and test fluid without influencing results.
  • Data-logging of load and displacement at intervals not exceeding 10 minutes.
• Conditioning and test conditions:
  • Typical specimen conditioning at (23 ± 2) °C and (50 ± 10) % RH for at least 24 h.
  • Default test temperature often (23 ± 2) °C unless otherwise agreed.
  • Test medium should reflect service conditions or be prepared from reagent-grade chemicals.
• Results: focus on departure strain/stress as a repeatable ranking parameter; time-to-failure is variable and not generally used for ranking.

Applications

• Comparative evaluation of ESC susceptibility for material selection.
• Screening new polymer formulations or additives for chemical compatibility.
• Rapid compatibility checks of plastics with service fluids.
• Failure investigation and R&D where ESC ranking accelerates decision-making.

Who should use this standard

• Plastics engineers and material scientists evaluating chemical resistance.
• Test laboratories performing ESC susceptibility screening.
• Manufacturers of polymer products (containers, pipes, fittings, consumer goods) needing compatibility data.
• R&D teams and quality control groups conducting comparative ranking tests.

Related standards

• ISO 22088-1 - General guidance on ESC testing.
• ISO 527-2 - Tensile specimen dimensions and test conditions.
• Other parts of ISO 22088 (Parts 2–5) cover alternative ESC methods (constant-load, bent-strip, impression, constant-deformation).

Keywords: environmental stress cracking, ESC, EN ISO 22088-6, slow strain rate method, plastics testing, tensile specimen, ESC susceptibility, ranking test, ISO 527-2.

SLOVENSKI STANDARD
01-oktober-2009
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Plastics - Determination of resistance to environmental stress cracking (ESC) - Part 6:
Slow strain rate method (ISO 22088-6:2006)
Kunststoffe - Bestimmung der Beständigkeit gegen umgebungsbedingte
Spannungsrissbildung (ESC) - Teil 6: Verfahren mit langsamer Dehnrate (ISO 22088-
6:2006)
Plastiques - Détermination de la fissuration sous contrainte dans un environnement
donné (ESC) - Partie 6: Méthode à vitesse de déformation lente (ISO 22088-6:2006)
Ta slovenski standard je istoveten z: EN ISO 22088-6:2009
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 22088-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2009
ICS 83.080.01
English Version
Plastics - Determination of resistance to environmental stress
cracking (ESC) - Part 6: Slow strain rate method (ISO 22088-
6:2006)
Plastiques - Détermination de la fissuration sous contrainte Kunststoffe - Bestimmung der Beständigkeit gegen
dans un environnement donné (ESC) - Partie 6: Méthode à umgebungsbedingte Spannungsrissbildung (ESC) - Teil 6:
vitesse de déformation lente (ISO 22088-6:2006) Verfahren mit langsamer Dehnrate (ISO 22088-6:2006)
This European Standard was approved by CEN on 23 May 2009.
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: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 22088-6:2009: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
The text of ISO 22088-6:2006 has been prepared by Technical Committee ISO/TC 61 “Plastics” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 22088-6:2009 by
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 2009, and conflicting national standards shall be withdrawn
at the latest by December 2009.
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.
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 22088-6:2006 has been approved by CEN as a EN ISO 22088-6:2009 without any
modification.
INTERNATIONAL ISO
STANDARD 22088-6
First edition
2006-08-01
Plastics — Determination of resistance to
environmental stress cracking (ESC) —
Part 6:
Slow strain rate method
Plastiques — Détermination de la fissuration sous contrainte dans un
environnement donné (ESC) —
Partie 6: Méthode à vitesse de déformation lente

Reference number
ISO 22088-6:2006(E)
©
ISO 2006
ISO 22088-6:2006(E)
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ii © ISO 2006 – All rights reserved

ISO 22088-6:2006(E)
Contents Page
Foreword. iv
1 Scope. 1
2 Normative references. 1
3 Terms and definitions. 1
4 Principle. 3
5 Apparatus. 4
6 Conditioning and test conditions. 5
6.1 Conditioning. 5
6.2 Test temperature. 5
6.3 Test medium. 5
7 Test specimens. 5
8 Procedure. 5
9 Expression of results. 6
10 Test report. 7
Annex A (normative) Strain calculation from crosshead displacement. 8
Bibliography . 9

ISO 22088-6:2006(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.
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 22088-6 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 6, Ageing,
chemical and environmental resistance.
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)
iv © ISO 2006 – All rights reserved

INTERNATIONAL STANDARD ISO 22088-6:2006(E)

Plastics — Determination of resistance to environmental stress
cracking (ESC) —
Part 6:
Slow strain rate method
1 Scope
This part of ISO 22088 describes a procedure for assessing the environmental stress cracking (ESC)
susceptibility of polymeric materials in chemical environments by slowly increasing the strain applied to a
tensile specimen at a constant rate.
It is applicable to test specimens prepared by moulding and/or machining and can be used to assess the
relative ESC susceptibility of a material exposed to different environments or the relative ESC susceptibility of
different plastics exposed to a specific environment.
This is essentially a ranking test and is not intended for the provision of design data.
The principle advantage of the test compared with the test methods described in Parts 2 to 5 of ISO 22088 is
the rapidity with which the ESC susceptibility of a particular polymer/environment combination can be
assessed.
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 527-2, Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and
extrusion plastics
ISO 22088-1, Plastics — Determination of resistance to environmental stress cracking (ESC) — Part 1:
General guidance
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 22088-1 and the following apply.
3.1
crosshead displacement
CHD
distance the crosshead has moved from the start of the test
3.2
crosshead speed
CHS
distance travelled by the crosshead, CHD, divided by the time from the start of the test
ISO 22088-6:2006(E)
3.3
length of parallel-sided section of specimen
l
leng
...