EN ISO 305:2019
(Main)Plastics - Determination of thermal stability of poly(vinyl chloride), related chlorine-containing homopolymers and copolymers and their compounds - Discoloration method (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)
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
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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.
Contents Page
European foreword . 3
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.
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
ISO 305:2019(E)
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii © ISO 2019 – All rights reserved
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 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
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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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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 www .iso
.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9,
Thermoplastic materials.
This third edition cancels and replaces the second edition (ISO 305:1990), of which it constitutes a
minor revision. The changes compared to the previous edition are as follows:
— editorial changes have been applied to align the document with the ISO structure;
— Clauses 2 and 3 have been added and subsequent clauses have been renumbered.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved
INTERNATIONAL STANDARD ISO 305:2019(E)
Plastics — Determination of thermal stability of poly(vinyl
chloride), related chlorine-containing homopolymers and
copolymers and their compounds — Discoloration method
1 Scope
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.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Ele
...
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