FprEN ISO 1628-1

SLOVENSKI STANDARD
oSIST prEN ISO 1628-1:2024
01-marec-2024
Polimerni materiali - Določanje viskoznosti polimerov v razredčenih raztopinah s
kapilarnimi viskozimetri - 1. del: Splošna načela (ISO/DIS 1628-1:2024)
Plastics - Determination of the viscosity of polymers in dilute solution using capillary
viscometers - Part 1: General principles (ISO/DIS 1628-1:2024)
Kunststoffe - Bestimmung der Viskosität von Polymeren in verdünnter Lösung durch ein
Kapillarviskosimeter - Teil 1: Allgemeine Grundlagen (ISO/DIS 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/DIS 1628-1:2024)
Ta slovenski standard je istoveten z: prEN ISO 1628-1
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
oSIST prEN ISO 1628-1:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 1628-1:2024
oSIST prEN ISO 1628-1:2024
DRAFT INTERNATIONAL STANDARD
ISO/DIS 1628-1
ISO/TC 61/SC 5 Secretariat: DIN
Voting begins on: Voting terminates on:
2024-01-16 2024-04-09
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
ICS: 83.080.01
This document is circulated as received from the committee secretariat.
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ISO/DIS 1628-1:2024(E)
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PROVIDE SUPPORTING DOCUMENTATION. © ISO 2024

oSIST prEN ISO 1628-1:2024
ISO/DIS 1628-1:2024(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 1628-1
ISO/TC 61/SC 5 Secretariat: DIN
Voting begins on: Voting terminates on:

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
ICS: 83.080.01
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2024
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
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NATIONAL REGULATIONS.
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ii
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023

oSIST prEN ISO 1628-1:2024
ISO/DIS 1628-1:2023(E)
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 . 4
4.1 General . 4
4.2 Method A – Efflux time method . . 4
4.3 Method B – Differential pressure method. 4
5 Apparatus . 6
5.1 Efflux time method . 6
5.2 Differential pressure method . 11
6 Solutions .12
6.1 Preparation .12
6.2 Concentration .12
7 Temperature of measurement .13
8 Procedure .13
8.1 Efflux time method . 13
8.1.1 General .13
8.1.2 Preparing and charging the viscometer . 13
8.1.3 Efflux time measurement . 13
8.2 Differential pressure method . 14
8.2.1 General . 14
8.2.2 Collection of viscosity ratio increment signal . 14
9 Expression of results .16
9.1 Reduced viscosity and intrinsic viscosity . 16
9.2 K-value. 17
10 Test report .17
Annex A (normative) Cleaning of apparatus (Efflux time method) .19
Annex B (informative) Notes on sources of error (Efflux time method) .20
Annex C (informative) Notes on sources of error (Differential pressure method) .23
Bibliography .25
iii
oSIST prEN ISO 1628-1:2024
ISO/DIS 1628-1:2023(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 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 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 5, Physical-
chemical properties.
This fifth edition cancels and replaces the fourth edition (ISO 1628-1:2021), which has been technically
revised.
The main changes are as follows:
— an introduction section has been added;
— the calculation of K-value was moved to 9.2;
— an alternative procedure has been incorporated, the differential pressure method, based on
comparing the differential pressure in capillary tubings due to the flow of polymer solution and
neat solvent simultaneously.
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
oSIST prEN ISO 1628-1:2024
ISO/DIS 1628-1:2023(E)
Introduction
Two methods are described in this document to determine the viscosity of polymer solutions, the
Efflux time method and the differential pressure method. The results of both methods are equivalent.
Differences may be found due to different conditions for the determination, such as concentration,
solvent or shear rate.
The differential pressure method which has been incorporated in the present revision has the
important advantage for industry that it is more easily adapted to automation, leading to improved
efficiency, higher throughput, and enhanced safety for th
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