SIST EN ISO 1628-1:2025

SLOVENSKI STANDARD
01-marec-2025
Polimerni materiali - Določanje viskoznosti polimerov v razredčenih raztopinah s
kapilarnimi viskozimetri - 1. del: Splošna načela (ISO 1628-1:2024)
Plastics - Determination of the viscosity of polymers in dilute solution using capillary
viscometers - Part 1: General principles (ISO 1628-1:2024)
Kunststoffe - Bestimmung der Viskosität von Polymeren in verdünnter Lösung durch ein
Kapillarviskosimeter - Teil 1: Allgemeine Grundlagen (ISO 1628-1:2024)
Plastiques - Détermination de la viscosité des polymères en solution diluée à l'aide de
viscosimètres à capillaires - Partie 1: Principes généraux (ISO 1628-1:2024)
Ta slovenski standard je istoveten z: EN ISO 1628-1:2024
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 1628-1
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2024
EUROPÄISCHE NORM
ICS 83.080.01 Supersedes EN ISO 1628-1:2021
English Version
Plastics - Determination of the viscosity of polymers in
dilute solution using capillary viscometers - Part 1:
General principles (ISO 1628-1:2024)
Plastiques - Détermination de la viscosité des Kunststoffe - Bestimmung der Viskosität von
polymères en solution diluée à l'aide de viscosimètres Polymeren in verdünnter Lösung durch ein
à capillaires - Partie 1: Principes généraux (ISO 1628- Kapillarviskosimeter - Teil 1: Allgemeine Grundlagen
1:2024) (ISO 1628-1:2024)
This European Standard was approved by CEN on 12 December 2024.

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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 1628-1:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 1628-1:2024) 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 2025, and conflicting national standards shall be
withdrawn at the latest by June 2025.
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 1628-1:2021.
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 1628-1:2024 has been approved by CEN as EN ISO 1628-1:2024 without any
modification.
International
Standard
ISO 1628-1
Fifth edition
Plastics — Determination of
2024-12
the viscosity of polymers in
dilute solution using capillary
viscometers —
Part 1:
General principles
Plastiques — Détermination de la viscosité des polymères en
solution diluée à l'aide de viscosimètres à capillaires —
Partie 1: Principes généraux
Reference number
ISO 1628-1:2024(en) © ISO 2024

ISO 1628-1:2024(en)
© ISO 2024
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 1628-1:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 Terms related to any liquid.1
3.2 Terms related to polymer solutions .2
4 Principle . 3
4.1 General .3
4.2 Method A — Efflux time method . .4
4.3 Method B — Differential pressure method.4
5 Apparatus . 5
5.1 Efflux time method .5
5.2 Differential pressure method .8
6 Solutions . 9
6.1 Preparation .9
6.2 Concentration .9
7 Temperature of measurement . 10
8 Procedure .10
8.1 Efflux time method .10
8.1.1 General .10
8.1.2 Preparing and charging the viscometer .10
8.1.3 Efflux time measurement .10
8.2 Differential pressure method .11
8.2.1 General .11
8.2.2 Collection of viscosity ratio increment signal .11
9 Expression of results .12
9.1 Reduced viscosity and intrinsic viscosity . 12
9.2 K-value.14
10 Test report . 14
Annex A (informative) Efflux time method — Notes on sources of error .16
Annex B (informative) Differential pressure method — Notes on sources of error .20
Annex C (normative) Efflux time method — Cleaning of apparatus.22
Bibliography .23

iii
ISO 1628-1:2024(en)
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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO
...