Foreword

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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 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 in relation to the new procedure;
— the calculation of K-value was moved to 9.2;
— an alternative procedure has been incorporated, the differential pressure method (see 4.3), based on comparing the differential pressure in capillary tubing 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.

BS EN ISO 1628-1:2024

Plastics. Determination of the viscosity of polymers in dilute solution using capillary viscometer - General principles

Current

Published:

31 Dec 2024