Plastics - Determination of thermal stability of poly(vinyl chloride), related chlorine-containing homopolymers and copolymers and their compounds - Discoloration method (ISO 305:2019)

This document specifies two methods for the determination of the thermal stability of products and compounds based on vinyl chloride homopolymers and copolymers (referred to simply as PVC in the following text) by the extent of the discoloration that occurs when they are exposed, in the form of sheet, to elevated temperatures. The two methods are:
—          Method A: Oil-bath method;
—          Method B: Oven method.
These methods are particularly applicable to the determination of the resistance of PVC to degradation by heat, as assessed by the change in colour after different times of heating under standardized conditions. The results are comparative only, and can be unsatisfactory when coloured PVC materials are tested.
The stability times given by the two methods might not be similar and cannot be used for direct-comparison purposes.

Kunststoffe - Bestimmung der Thermostabilität von Polyvinylchlorid (PVC), verwandten chlorhaltigen Homopolymeren und Copolymeren und ihren Formmassen - Verfärbungsverfahren (ISO 305:2019)

In diesem Dokument werden zwei Verfahren festgelegt, mit denen die Thermostabilität von Erzeugnissen und Formmassen aus vinylchloridhaltigen Homopolymeren und Copolymeren (im weiteren Text als PVC bezeichnet) aus der Verfärbung bestimmt wird, die auftritt, wenn sie in Form von Tafeln erhöhten Temperaturen ausgesetzt werden. Die beiden Verfahren sind:
   Verfahren A: Ölbadverfahren;
   Verfahren B: Ofenverfahren.
Diese beiden Verfahren sind besonders zur Bestimmung der Beständigkeit von PVC gegen thermische Abbauvorgänge anwendbar, die durch die Verfärbung von Probekörpern nach unterschiedlicher Erwärmungsdauer unter genormten Bedingungen beurteilt wird. Die Ergebnisse sind lediglich vergleichend; bei der Prüfung gefärbter PVC-Werkstoffe können unbefriedigende Ergebnisse anfallen.
Die nach den beiden Verfahren ermittelten Stabilitätszeiten sind möglicherweise nicht ähnlich und können nicht für direkte Vergleichszwecke verwendet werden.

Plastiques - Détermination de la stabilité thermique du poly(chlorure de vinyle), des homopolymères et copolymères chlorés apparentés et de leurs compositions - Méthode du changement de couleur (ISO 305:2019)

Le présent document spécifie deux méthodes pour la détermination de la stabilité thermique des produits et compositions à base d'homopolymères et de copolymères de polychlorure de vinyle (désignés simplement par PVC dans le texte qui suit), par l'importance du changement de couleur qui se produit lorsqu'ils sont exposés à des températures élevées, sous forme de feuilles. Ces deux méthodes sont les suivantes :
—          Méthode A : Méthode au bain à huile ;
—          Méthode B : Méthode à l'étuve.
Ces méthodes conviennent pour déterminer la résistance du PVC à la dégradation par la chaleur, par appréciation des changements de couleur après différents temps de chauffage dans des conditions normalisées. Les résultats sont seulement comparatifs, ils peuvent être peu satisfaisants lorsque du PVC coloré est soumis à l'essai.
Les temps de stabilité donnés par les deux méthodes peuvent ne pas être similaires et ils ne peuvent pas être utilisés pour des comparaisons directes.

Polimerni materiali - Določanje toplotne stabilnosti polivinilklorida, sorodnih homo- in kopolimerov ter njihovih zmesi, ki vsebujejo klor - Metoda razbarvanja (ISO 305:2019)

Ta dokument določa dve metodi za določitev toplotne stabilnosti izdelkov in spojin na osnovi homopolimerov in kopolimerov vinilklorida (v besedilu krajše poimenovanih PVC) glede na stopnjo spremembe barve, ki se pojavi, ko so v obliki listov izpostavljeni povišanim temperaturam. Omenjeni metodi sta:
– Metoda A: Metoda z oljno kopeljo;
– Metoda B: Metoda s pečjo.
Metodi sta posebej uporabni za določanje odpornosti PVC na razgradnjo zaradi toplote, ocenjeno s spremembo barve po različnih časih segrevanja v standardiziranih pogojih. Rezultati so zgolj primerjalni in so lahko pri preskušanju obarvanih PVC-materialov nezadovoljivi.
Časi stabilnosti, ki jih podajata metodi, morda ne bodo podobni in jih ne bo mogoče uporabiti za namen neposredne primerjave.

General Information

Status
Published
Publication Date
11-Jun-2019
Technical Committee
Drafting Committee
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
12-Jun-2019
Completion Date
12-Jun-2019

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SLOVENSKI STANDARD
SIST EN ISO 305:2019
01-september-2019
Nadomešča:
SIST EN ISO 305:2000
Polimerni materiali - Določanje toplotne stabilnosti polivinilklorida, sorodnih
homo- in kopolimerov ter njihovih zmesi, ki vsebujejo klor - Metoda razbarvanja
(ISO 305:2019)

Plastics - Determination of thermal stability of poly(vinyl chloride), related chlorine-

containing homopolymers and copolymers and their compounds - Discoloration method

(ISO 305:2019)

Kunststoffe - Bestimmung der Thermostabilität von Polyvinylchlorid (PVC), verwandten

chlorhaltigen Homopolymeren und Copolymeren und ihren Formmassen -
Verfärbungsverfahren (ISO 305:2019)

Plastiques - Détermination de la stabilité thermique du poly(chlorure de vinyle), des

homopolymères et copolymères chlorés apparentés et de leurs compositions - Méthode

du changement de couleur (ISO 305:2019)
Ta slovenski standard je istoveten z: EN ISO 305:2019
ICS:
83.080.20 Plastomeri Thermoplastic materials
SIST EN ISO 305:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 305:2019
---------------------- Page: 2 ----------------------
SIST EN ISO 305:2019
EN ISO 305
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2019
EUROPÄISCHE NORM
ICS 83.080.20 Supersedes EN ISO 305:1999
English Version
Plastics - Determination of thermal stability of poly(vinyl
chloride), related chlorine-containing homopolymers and
copolymers and their compounds - Discoloration method
(ISO 305:2019)

Plastiques - Détermination de la stabilité thermique du Kunststoffe - Bestimmung der Thermostabilität von

poly(chlorure de vinyle), des homopolymères et Polyvinylchlorid (PVC), verwandten chlorhaltigen

copolymères chlorés apparentés et de leurs Homopolymeren und Copolymeren und ihren

compositions - Méthode du changement de couleur Formmassen - Verfärbungsverfahren (ISO 305:2019)

(ISO 305:2019)
This European Standard was approved by CEN on 26 May 2019.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, North

Macedonia, 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

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 305:2019 E

worldwide for CEN national Members.
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SIST EN ISO 305:2019
EN ISO 305:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 305:2019
EN ISO 305:2019 (E)
European foreword

This document (EN ISO 305:2019) 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 December 2019, and conflicting national standards

shall be withdrawn at the latest by December 2019.

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 305:1999.

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 305:2019 has been approved by CEN as EN ISO 305:2019 without any modification.

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SIST EN ISO 305:2019
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SIST EN ISO 305:2019
INTERNATIONAL ISO
STANDARD 305
Third edition
2019-05
Plastics — Determination of thermal
stability of poly(vinyl chloride), related
chlorine-containing homopolymers
and copolymers and their compounds
— Discoloration method
Plastiques — Détermination de la stabilité thermique du poly(chlorure
de vinyle), des homopolymères et copolymères chlorés apparentés et de
leurs compositions — Méthode du changement de couleur
Reference number
ISO 305:2019(E)
ISO 2019
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SIST EN ISO 305:2019
ISO 305:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

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.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
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 2019 – All rights reserved
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SIST EN ISO 305:2019
ISO 305:2019(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 1

4.1 Method A: Oil-bath method .......................................................................................................................................................... 1

4.2 Method B: Oven method ................................................................................................................................................................. 2

5 Preparation and number of test specimens ............................................................................................................................. 2

6 Test temperature .................................................................................................................................................................................................. 2

7 Method A: Oil-bath method ....................................................................................................................................................................... 2

7.1 Apparatus .................................................................................................................................................................................................... 2

7.2 Procedure .................................................................................................................................................................................................... 3

8 Method B: Oven method ................................................................................................................................................................................ 3

8.1 Apparatus .................................................................................................................................................................................................... 3

8.2 Procedure .................................................................................................................................................................................................... 4

9 Expression of results ........................................................................................................................................................................................ 4

10 Precision ....................................................................................................................................................................................................................... 5

11 Test report ................................................................................................................................................................................................................... 5

Bibliography ................................................................................................................................................................................................................................ 6

© ISO 2019 – All rights reserved iii
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SIST EN ISO 305:2019
ISO 305:2019(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).
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