SIST EN ISO 11357-6:2018

SLOVENSKI STANDARD
SIST EN ISO 11357-6:2018
01-junij-2018
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SIST EN ISO 11357-6:2013
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Plastics - Differential scanning calorimetry (DSC) - Part 6: Determination of oxidation
induction time (isothermal OIT) and oxidation induction temperature (dynamic OIT) (ISO
11357-6:2018)
Kunststoffe - Dynamische Differenz-Thermoanalyse (DSC) - Teil 6: Bestimmung der
Oxidations-Induktionszeit (isothermische OIT) und Oxidations-Induktionstemperatur
(dynamische OIT) (ISO 11357-6:2018)
Plastiques - Analyse calorimétrique différentielle (DSC) - Partie 6: Détermination du
temps d'induction à l'oxydation (OIT isotherme) et de la température d'induction à
l'oxydation (OIT dynamique) (ISO 11357-6:2018)
Ta slovenski standard je istoveten z: EN ISO 11357-6:2018
ICS:
17.200.10 Toplota. Kalorimetrija Heat. Calorimetry
83.080.01 Polimerni materiali na Plastics in general
splošno
SIST EN ISO 11357-6:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 11357-6:2018

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SIST EN ISO 11357-6:2018


EN ISO 11357-6
EUROPEAN STANDARD

NORME EUROPÉENNE

April 2018
EUROPÄISCHE NORM
ICS 83.080.01 Supersedes EN ISO 11357-6:2013
English Version

Plastics - Differential scanning calorimetry (DSC) - Part 6:
Determination of oxidation induction time (isothermal
OIT) and oxidation induction temperature (dynamic OIT)
(ISO 11357-6:2018)
Plastiques - Analyse calorimétrique différentielle (DSC) Kunststoffe - Dynamische Differenz-Thermoanalyse
- Partie 6: Détermination du temps d'induction à (DSC) - Teil 6: Bestimmung der Oxidations-
l'oxydation (OIT isotherme) et de la température Induktionszeit (isothermische OIT) und Oxidations-
d'induction à l'oxydation (OIT dynamique) (ISO 11357- Induktionstemperatur (dynamische OIT) (ISO 11357-
6:2018) 6:2018)
This European Standard was approved by CEN on 24 February 2018.

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-CENELEC 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-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11357-6:2018 E
worldwide for CEN national Members.

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SIST EN ISO 11357-6:2018
EN ISO 11357-6:2018 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 11357-6:2018
EN ISO 11357-6:2018 (E)
European foreword
This document (EN ISO 11357-6:2018) 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
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 October 2018, and conflicting national standards shall
be withdrawn at the latest by October 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 11357-6:2013.
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,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 11357-6:2018 has been approved by CEN as EN ISO 11357-6:2018 without any
modification.

3

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SIST EN ISO 11357-6:2018

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SIST EN ISO 11357-6:2018
INTERNATIONAL ISO
STANDARD 11357-6
Third edition
2018-03
Plastics — Differential scanning
calorimetry (DSC) —
Part 6:
Determination of oxidation induction
time (isothermal OIT) and oxidation
induction temperature (dynamic OIT)
Plastiques — Analyse calorimétrique différentielle (DSC) —
Partie 6: Détermination du temps d'induction à l'oxydation (OIT
isotherme) et de la température d'induction à l'oxydation (OIT
dynamique)
Reference number
ISO 11357-6:2018(E)
©
ISO 2018

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SIST EN ISO 11357-6:2018
ISO 11357-6:2018(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
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Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved

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SIST EN ISO 11357-6:2018
ISO 11357-6:2018(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
4.1 General . 2
4.2 Oxidation induction time (isothermal OIT) . 2
4.3 Oxidation induction temperature (dynamic OIT) . 2
5 Apparatus and materials. 3
5.1 General . 3
5.2 DSC instrument . 3
5.3 Crucibles . 3
5.4 Flowmeter . 3
5.5 Oxygen . 3
5.6 Air . 3
5.7 Nitrogen . 3
5.8 Gas-selector switch and regulators . 3
6 Test specimens. 4
6.1 General . 4
6.2 Specimens from compression-moulded plates . 4
6.3 Specimens from injection-moulded plates or melt flow extrudates . 4
6.4 Specimens from finished parts . 4
7 Test conditions and specimen conditioning . 5
8 Calibration . 5
8.1 Oxidation induction time (isothermal OIT) . 5
8.2 Oxidation induction temperature (dynamic OIT) . 5
9 Procedure. 5
9.1 Setting up the instrument . 5
9.2 Loading the test specimen into the crucible . 5
9.3 Insertion of crucibles . 5
9.4 Nitrogen, air and oxygen flow . 5
9.5 Sensitivity adjustment . 6
9.6 Performance of measurement . 6
9.6.1 Oxidation induction time (isothermal OIT) . 6
9.6.2 Oxidation induction temperature (dynamic OIT) . 7
9.7 Cleaning . 7
10 Expression of results . 8
11 Precision and bias .10
12 Test report .10
Bibliography .12
© ISO 2018 – All rights reserved iii

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SIST EN ISO 11357-6:2018
ISO 11357-6:2018(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 (see 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 (see 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.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 5, Physical-
chemical properties.
This third edition cancels and replaces the second edition (ISO 11357-6:2008), which has been
technically revised. The main changes compared to the previous edition are as follows:
— the normative references in Clause 2 have been updated;
— techniques for purge gas flow control have been extended.
A list of all parts in the ISO 11357 series can be found on the ISO website.
iv © ISO 2018 – All rights reserved

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SIST EN ISO 11357-6:2018
ISO 11357-6:2018(E)

Introduction
The measurement of oxidation induction time or temperature described in this document provides a
tool to assess the conformity of the material tested to a given formulation of plastics compounds, but
it is not intended to provide the concentration of antioxidant. Different antioxidants can have different
oxidation induction times or temperatures. Due to interaction of the antioxidant with other substances
in the formulation, different oxidation induction times or temperatures can result even with products
having the same type and concentration of antioxidant.
© ISO 2018 – All rights reserved v

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SIST EN ISO 11357-6:2018

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SIST EN ISO 11357-6:2018
INTERNATIONAL STANDARD ISO 11357-6:2018(E)
Plastics — Differential scanning calorimetry (DSC) —
Part 6:
Determination of oxidation induction time (isothermal
OIT) and oxidation induction temperature (dynamic OIT)
1 Scope
This document specifies methods for the determination of oxidation induction time (isothermal OIT)
and oxidation induction temperature (dynamic OIT) of polymeric materials by means of differential
scanning calorimetry (DSC). It is applicable to polyolefin resins that are in a fully stabilized or
compounded form, either as raw materials or finished products. It can be applicable to other plastics.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 293, Plastics — Compression moulding of test specimens of thermoplastic materials
ISO 294-3, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 3: Small plates
ISO 472, Plastics — Vocabulary
ISO 8986-2, Plastics — Polybutene-1 (PB-1) moulding and extrusion materials — Part 2: Preparation of
test specimens and determination of properties
ISO 11357-1, Plastics — Differential scanning calorimetry (DSC) — Part 1: General principles
ISO 17855-2, Plastics — Polyethylene (PE) moulding and extrusion materials — Part 2: Preparation of test
specimens and determination of properties
ISO 19069-2, Plastics — Polypropylene (PP) moulding and extrusion materials — Part 2: Preparation of
test specimens and determination of properties
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 472 and ISO 11357-1 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at https:// www .iso .org/ obp
© ISO 2018 – All rights reserved 1

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SIST EN ISO 11357-6:2018
ISO 11357-6:2018(E)

3.1
oxidation induction time
isothermal OIT
relative measure of a stabilized material’s resistance to oxidative decomposition, determined by the
calorimetric measurement of the time interval to the onset of exothermic oxidation of the material at a
specified temperature in an oxygen or air atmosphere, under atmospheric pressure
Note 1 to entry: It is expressed in minutes (min).
3.2
oxidation induction temperature
dynamic OIT
relative measure of a stabilized material’s resistance to oxidative decomposition, determined by the
calorimetric measurement of the temperature of the onset of exothermic oxidation of the material
when subjected to a specified heating rate in an oxygen or air atmosphere, under atmospheric pressure
Note 1 to entry: It is expressed in degrees Celsius (°C).
Note 2 to entry: The oxidation induction temperature is also called oxidation onset temperature (OOT).
4 Principle
4.1 General
The time for which, or the temperature up to which, an antioxidant stabilizer system present in a
test specimen inhibits oxidation is measured while the specimen is held isothermally at a specified
temperature or heated at a constant rate in an oxygen or air atmosphere. The oxidation induction time
or temperature is an assessment of the level (or degree) of stabilization of the material tested. Higher
test temperatures will result in shorter oxidation induction times; faster heating rates will result in
higher oxidation induction temperatures. The oxidation induction time and temperature are also
dependen
...