EN ISO 182-3:2023

SLOVENSKI STANDARD
01-februar-2024
Polimerni materiali - Ugotavljanje tendence zmesi in proizvodov na osnovi homo-
in kopolimerov vinilklorida po sproščanju klorovodika ali drugih kislih produktov
pri povišanih temperaturah - 3. del: Konduktometrična metoda (ISO 182-3:2023)
Plastics - Determination of the tendency of compounds and products based on vinyl
chloride homopolymers and copolymers to evolve hydrogen chloride and any other
acidic products at elevated temperatures - Part 3: Conductometric method (ISO 182-
3:2023)
Kunststoffe - Bestimmung der Neigung von Formmassen und Erzeugnissen auf der
Basis von Vinylchlorid-Homopolymeren und -Copolymeren, bei erhöhten Temperaturen
Chlorwasserstoff und andere saure Produkte abzugeben - Teil 3: Leitfähigkeitsverfahren
(ISO 182-3:2023)
Plastiques - Détermination de la tendance des compositions et produits à base
d’homopolymères et de copolymères du chlorure de vinyle à dégager du chlorure
d’hydrogène et éventuellement d’autres produits acides à températures élevées - Partie
3: Méthode conductimétrique (ISO 182-3:2023)
Ta slovenski standard je istoveten z: EN ISO 182-3:2023
ICS:
83.080.20 Plastomeri Thermoplastic materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 182-3
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2023
EUROPÄISCHE NORM
ICS 83.080.20 Supersedes EN ISO 182-3:2000
English Version
Plastics - Determination of the tendency of compounds and
products based on vinyl chloride homopolymers and
copolymers to evolve hydrogen chloride and any other
acidic products at elevated temperatures - Part 3:
Conductometric method (ISO 182-3:2023)
Plastiques - Détermination de la tendance des Kunststoffe - Bestimmung der Neigung von
compositions et produits à base d'homopolymères et Formmassen und Erzeugnissen auf der Basis von
de copolymères du chlorure de vinyle à dégager du Vinylchlorid-Homopolymeren und -Copolymeren, bei
chlorure d'hydrogène et éventuellement d'autres erhöhten Temperaturen Chlorwasserstoff und andere
produits acides à températures élevées - Partie 3: saure Produkte abzugeben - Teil 3:
Méthode conductimétrique (ISO 182-3:2023) Leitfähigkeitsverfahren (ISO 182-3:2023)
This European Standard was approved by CEN on 11 December 2023.

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, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye 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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 182-3:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 182-3:2023) 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 SIS.
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 June 2024, and conflicting national standards shall be
withdrawn at the latest by June 2024.
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 182-3:2000.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 182-3:2023 has been approved by CEN as EN ISO 182-3:2023 without any modification.

INTERNATIONAL ISO
STANDARD 182-3
Second edition
2023-12
Plastics — Determination of
the tendency of compounds and
products based on vinyl chloride
homopolymers and copolymers to
evolve hydrogen chloride and any
other acidic products at elevated
temperatures —
Part 3:
Conductometric method
Plastiques — Détermination de la tendance des compositions et
produits à base d’homopolymères et de copolymères du chlorure de
vinyle à dégager du chlorure d’hydrogène et éventuellement d’autres
produits acides à températures élevées —
Partie 3: Méthode conductimétrique
Reference number
ISO 182-3:2023(E)
ISO 182-3:2023(E)
© ISO 2023
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
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 182-3:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Principle . 2
5 Reagents . 2
6 Apparatus . 2
7 Preparation of test samples .7
7.1 General . 7
7.2 PVC plastisols . . 7
7.3 PVC pellets, extrudates, mouldings, thick sheet, etc. . 7
7.4 PVC film and sheet . 7
7.5 PVC coatings . 7
7.6 Cable and conductor insulation or sheating . 7
8 Number of tests . 7
9 Temperatures for dehydrochlorination . 7
10 Test procedure .8
10.1 Preparation of test portion . 8
10.2 Preliminary operations . 8
10.3 Special precautions when using dehydrochlorination cell A . 8
10.4 Preparation of the measurement cell . 8
10.5 Decomposition of the test portion . 9
11 Expression of results . 9
12 Test report . 9
13 Precision . 9
13.1 General . 9
13.2 Repeatability . 10
13.3 Reproducibility . 10
13.4 Comparison with the pH-meter method (ISO 182-2) . 10
13.5 Factors affecting the stability time . 10
13.6 Conclusions . 13
Annex A (informative) Cleaning of the apparatus .14
Annex B (informative) Calculation of repeatability and reproducibility — Conductometric
and pH-meter methods . .15
Annex C (informative) Interlaboratory test.17
Bibliography .19
iii
ISO 182-3:2023(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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As of the date of publication of this document, ISO had not received
notice of (a) patent(s) which may be required to implement this document. However, implementers are
cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all
such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of 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
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9,
Thermoplastic materials, in collaboration with the European Committee for Standardization (CEN)
Technical Committee CEN/TC 249, Plastics, in accordance with the Agreement on technical cooperation
between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 182-3:1993), which has been technically
revised.
The main changes are as follows:
— adding the use of alternative heating baths such as metal blocks.
A list of all parts in the ISO 182 series can be found on the ISO website.
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
INTERNATIONAL STANDARD ISO 182-3:2023(E)
Plastics — Determination of the tendency of compounds
and products based on vinyl chloride homopolymers and
copolymers to evolve hydrogen chloride and any other
acidic products at elevated temperatures —
Part 3:
Conductometric method
WARNING — The use of this document can involve hazardous materials, operations and
equipment. This document does not purport to address all of the safety problems associated
with its use. It is the responsibility of the user of this document to establish appropriate safety
and health practices and determine the applicability of regulatory limitations prior to use.
1 Scope
1.1 This document specifies a method for the determination of the thermal stability at elevated
temperature of compounds and products based on vinyl chloride homopolymers and copolymers (in
the following text abbreviated as PVC) which undergo dehydrochlorination (the evolution of hydrogen
chloride).
1.2 This document is applicable to the characterization of PVC compounds and products, especially
with regard to the effectiveness of their heat-stabilizing systems.
It is applicable to coloured PVC compounds and products where a discolouration test under the action
of heat may be unsatisfactory.
1.3 This document is applicable to compounded PVC materials and products. It can be applicable
to polymers in powder form under appropriate conditions, to be agreed upon between the interested
parties.
This document does not apply to PVC compounds in the form of dry blends, since such materials can be
not sufficiently homogeneous.
1.4 This document does not apply to PVC compounds and products which evolve other decomposition
products, in addition to hydrogen chloride, at elevated temperatures that can affect the conductivity of
water when they are absorbed into it. In this case, a method suitable for the determination of chloride
− [2]
ion (Cl ) in the absorbing solution shall be used (see ISO 182-4 ).
1.5 This document can also be applied to other plastics materials which can evolve hydrogen chloride
or other hydrogen halides when heated under the conditions prescribed by the relevant specifications,
or as agreed upon between the interested parties.
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 565, Test sieves — Metal wire cloth, perforated metal plate and electroformed sheet — Nominal sizes
of openings
ISO 182-3:2023(E)
ISO 4793, Laboratory sintered (fritted) filters — Porosity grading, classification and designation
ISO 6353-2, Reagents for chemical analysis — Part 2: Specifications — First series
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
stability time
t
s
time, measured by reference to a predetermined change in the conductivity of absorbing demineralized
water, required for a certain amount of hydrogen chloride to be evolved when a prescribed mass of PVC
compound or product is maintained at an elevated temperature under the test conditions specified in
this document
4 Principle
A test portion of the PVC compound or product is maintained at an agreed temperature in a nitrogen gas
stream and the hydrogen chloride evolved is absorbed in a given amount of demineralized water. The
amount of hydrogen chloride evolved is determined in relation to the recorded change in conductivity
of the water.
5 Reagents
During the test, use only reagents of recognized analytical grade in accordance with ISO 6353-2.
5.1 Pure nitrogen, containing less than 6 ppm oxygen and less than 0,1 ppm carbon dioxide by
volume. The purity shall be such that when the gas is passed through demineralized water (see 5.2) for
1 h at a rate of (7,2 ± 0,1)
...