EN ISO 1628-1:2021

SLOVENSKI STANDARD
01-maj-2021
Nadomešča:
SIST EN ISO 1628-1:2009
SIST EN ISO 1628-1:2009/A1:2012
Polimerni materiali - Določanje viskoznosti polimerov v razredčenih raztopinah s
kapilarnimi viskozimetri - 1. del: Splošna načela (ISO 1628-1:2021)
Plastics - Determination of the viscosity of polymers in dilute solution using capillary
viscometers - Part 1: General principles (ISO 1628-1:2021)
Kunststoffe - Bestimmung der Viskosität von Polymeren in verdünnter Lösung durch ein
Kapillarviskosimeter - Teil 1: Allgemeine Grundlagen (ISO 1628-1:2021)
Plastiques - Détermination de la viscosité des polymères en solution diluée à l'aide de
viscosimètres à capillaires - Partie 1: Principes généraux (ISO 1628-1:2021)
Ta slovenski standard je istoveten z: EN ISO 1628-1:2021
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
March 2021
EUROPÄISCHE NORM
ICS 83.080.01 Supersedes EN ISO 1628-1:2009
English Version
Plastics - Determination of the viscosity of polymers in
dilute solution using capillary viscometers - Part 1:
General principles (ISO 1628-1:2021)
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
1:2021) (ISO 1628-1:2021)
This European Standard was approved by CEN on 23 February 2021.

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, 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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 1628-1:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 1628-1:2021) 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 September 2021, and conflicting national standards
shall be withdrawn at the latest by September 2021.
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 1628-1:2009.
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, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 1628-1:2021 has been approved by CEN as EN ISO 1628-1:2021 without any
modification.
INTERNATIONAL ISO
STANDARD 1628-1
Fourth edition
2021-02
Plastics — Determination of 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 1628-1:2021(E)
©
ISO 2021
ISO 1628-1:2021(E)
© ISO 2021
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
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

ISO 1628-1:2021(E)
Contents Page
Foreword .iv
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 . 4
5 Apparatus . 5
6 Solutions . 8
6.1 Preparation . 8
6.2 Concentration. 9
7 Temperature of measurement . 9
8 Procedure. 9
8.1 General . 9
8.2 Preparing and charging the viscometer . 9
8.3 Efflux time measurement .10
9 Expression of results .10
9.1 Reduced viscosity and intrinsic viscosity .10
9.2 K-value .11
10 Test report .11
Annex A (normative) Cleaning of apparatus .12
Annex B (informative) Notes on sources of error .13
Bibliography .16
ISO 1628-1:2021(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 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 5, Physical-
chemical properties, 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 fourth edition cancels and replaces the third edition (ISO 1628-1:2009), which has been technically
revised. It also incorporates the Amendment 1 ISO 1628-1:2009/Amd 1:2012.
The main changes compared to the previous edition are as follows:
— ISO 3205 (withdrawn) has been deleted from Clause 2;
— the figure keys have been revised;
— nominal viscometer constant has been added to Table 1;
A list of all parts in the ISO 1628 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 © ISO 2021 – All rights reserved

INTERNATIONAL STANDARD ISO 1628-1:2021(E)
Plastics — Determination of the viscosity of polymers in
dilute solution using capillary viscometers —
Part 1:
General principles
1 Scope
This document defines the general conditions for the determination of the reduced viscosity, intrinsic
viscosity and K-value of organic polymers in dilute solution. It defines the standard parameters that are
applied to viscosity measurement.
This document is used to develop standards for measuring the viscosities in solution of individual types
of polymer. It is also used to measure
...