ISO 17278:2013

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)

General Information

• Status: Withdrawn
• Publication Date: 06-Aug-2013
• Withdrawal Date: 06-Aug-2013
• ICS: 83.040.10 - Latex and raw rubber
• Technical Committee: ISO/TC 45/SC 3 - Raw materials (including latex) for use in the rubber industry
• Drafting Committee: ISO/TC 45/SC 3/WG 4 - Natural rubber
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 30-Apr-2020

Relations

• Revised: ISO 17278:2020 - Rubber, raw natural — Determination of the gel content of technically specified rubber (TSR)
• Effective Date: 23-Apr-2020
• Consolidated By: ISO 14620-1:2018 - Space systems — Safety requirements — Part 1: System safety
• Effective Date: 06-Jun-2022

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 2013

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ii © ISO 2013 – All rights reserved
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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

© ISO 2013 – All rights reserved iii
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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/directives

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. 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/patents

Any 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 references

The 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 Principle

An 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 concerned
5 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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