ISO 17564:2001

Nitrile rubber — Determination of residual unsaturation in hydrogenated nitrile rubber (HNBR) by iodine value

Caoutchouc nitrile — Détermination de l'insaturation résiduelle dans le caoutchouc nitrile hydrogéné (HNBR) par l'indice d'iode

General Information

• Status: Withdrawn
• Publication Date: 14-Feb-2001
• Withdrawal Date: 14-Feb-2001
• ICS: 83.060 - Rubber
• Technical Committee: ISO/TC 45/SC 2 - Testing and analysis
• Drafting Committee: ISO/TC 45/SC 2 - Testing and analysis
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 14-May-2008

Relations

• Revised: ISO 17564:2008 - Raw hydrogenated nitrile rubber (HNBR) — Determination of residual unsaturation by iodine value
• Effective Date: 15-Apr-2008

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 17564
First edition
2001-02-15
Nitrile rubber — Determination of residual
unsaturation in hydrogenated nitrile rubber
(HNBR) by iodine value
Caoutchouc nitrile — Détermination de l'insaturation résiduelle dans le
caoutchouc nitrile hydrogéné (HNBR) par l'indice d'iode
Reference number
ISO/FDIS 17564:2001(E)
©
ISO 2001

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ISO 17564:2001(E)
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ISO 17564:2001(E)
Contents Page
Foreword.iv
1 Scope .1
2 Normative references .1
3 Principle.1
4 Reagents.1
5 Apparatus .2
6 Procedure .2
7 Calculation.3
8 Precision.3
9 Test report .4
Annex A (normative) Preparation of Wijs’ solution.5
Bibliography.6
© ISO 2001 – All rights reserved iii

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ISO 17564:2001(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 3.
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 International Standard may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 17564 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products,
Subcommittee SC 2, Testing and analyses.
Annex A forms a normative part of this International Standard.
iv © ISO 2001 – All rights reserved

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INTERNATIONAL STANDARD ISO 17564:2001(E)
Nitrile rubber — Determination of residual unsaturation
in hydrogenated nitrile rubber (HNBR) by iodine value
WARNING — Persons using this International Standard should be familiar with normal laboratory practice.
This standard does not purport to address all of the safety problems, if any, associated with its use. It is
the responsibility of the user to establish appropriate safety and health practices and to ensure compliance
with any national regulatory conditions.
1 Scope
This International Standard specifies a method using Wijs’ solution to determine the iodine value (i.e. the residual
unsaturation) of hydrogenated nitrile rubber (HNBR).
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this International Standard. For dated references, subsequent amendments to, or revisions of, any of these
publications do not apply. However, parties to agreements based on this International Standard are encouraged to
investigate the possibility of applying the most recent editions of the normative documents indicated below. For
undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC
maintain registers of currently valid International Standards.
ISO 1795:2000, Rubber, raw natural and raw synthetic — Sampling and further preparative procedures.
ISO/TR 9272:1986, Rubber and rubber products — Determination of precision for test method standards.
3Principle
A sample of raw, unvulcanized HNBR is dissolved in chloroform. A known excess of Wijs’ solution is added to the
solution and a fixed time is allowed for addition of iodine to the residual unsaturation in the HNBR. Unreacted Wijs’
solution is then neutralized with potassium iodide solution, the iodine thus liberated titrated with standard sodium
thiosulfate and the iodine value (residual unsaturation) calculated.
4 Reagents
During the analysis, unless otherwise stated, use only reagents of recognized analytical grade and distilled or
demineralized water or water of equivalent purity.
4.1 Chloroform.
4.2 Wijs’ solution (see Annex A).
4.3 100 g/l aqueous potassium iodide solution.
4.4 10 g/l starch solution.
4.5 0,1 mol/l standard volumetric sodium thios
...