ISO 17278:2013
(Main)Rubber, raw natural — Determination of the gel content of technically specified rubber (TSR)
Rubber, raw natural — Determination of the gel content of technically specified rubber (TSR)
ISO 17278:2013 specifies a method for the determination of gel content for technically specified rubbers (TSR).
Caoutchouc naturel brut — Détermination de la teneur en gel des caoutchoucs spécifiés techniquement (TSR)
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 17278
First edition
2013-08-15
Rubber, raw natural — Determination
of the gel content of technically
specified rubber (TSR)
Caoutchouc naturel brut — Détermination de la teneur en gel des
caoutchoucs spécifiés techniquement (TSR)
Reference number
ISO 17278:2013(E)
ISO 2013
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ISO 17278:2013(E)
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ISO 17278:2013(E)
Contents Page
Foreword ........................................................................................................................................................................................................................................iv
1 Scope ................................................................................................................................................................................................................................. 1
2 Normative references ...................................................................................................................................................................................... 1
3 Principle ........................................................................................................................................................................................................................ 1
4 Terms and definitions ..................................................................................................................................................................................... 1
5 Reagent ........................................................................................................................................................................................................................... 1
6 Apparatus ..................................................................................................................................................................................................................... 2
7 Conditions.................................................................................................................................................................................................................... 2
8 Procedure..................................................................................................................................................................................................................... 2
8.1 Number of test samples ................................................................................................................................................................... 2
8.2 Procedure .................................................................................................................................................................................................... 2
9 Expression of the result................................................................................................................................................................................. 3
10 Precision ....................................................................................................................................................................................................................... 3
11 Test report ................................................................................................................................................................................................................... 3
Annex A (informative) Precision ............................................................................................................................................................................... 5
Bibliography ................................................................................................................................................................................................................................ 7
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ISO 17278:2013(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.The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directivesAttention 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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received. www.iso.org/patentsAny trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.The committee responsible for this document is ISO/TC 45, Rubber and rubber products, Subcommittee
SC 3, Raw materials (including latex) for use in the rubber industry.iv © ISO 2013 – All rights reserved
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INTERNATIONAL STANDARD ISO 17278:2013(E)
Rubber, raw natural — Determination of the gel content of
technically specified rubber (TSR)
1 Scope
This International Standard specifies a method for the determination of gel content for technically
specified rubbers (TSR).WARNING — Persons using this International Standard should be familiar with normal laboratory
practice. This International 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.
2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are
indispensable to its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 2000, Rubber, raw natural — Guidelines for the specification of technically specified rubber (TSR)
ISO 23529, Rubber — General procedures for preparing and conditioning test pieces for physical test methods
3 PrincipleAn LoV-TSR sample is dissolved in toluene under specified conditions, and the gel content is calculated
as the percentage mass fraction of the insoluble part of the rubber.4 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
4.1
technically specified rubber
TSR
natural rubber obtained from the latex of Hevea brasiliensis (typically processed into block rubber), and
having properties complying with the criteria for the grade concerned5 Reagent
Use only reagents of recognized analytical grade.
5.1 Toluene, analytical grade.
CAUTION — The solvent might evaporate from the flask or tube when it is handled. Therefore,
handling this solvent should be done only when permitted by local health and safety regulation
and only in a well-ventilated appropriate place.1) Under preparation. (Revision of ISO 2000:2003)
© ISO 2013 – All rights reserved 1
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