UNLIMITED FREE ACCESS TO THE WORLD'S BEST IDEAS

SUBMIT
Already an Engineering360 user? Log in.

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

Customize Your Engineering360 Experience

Finish!
Privacy Policy

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

ISO 20965

Plastics — Determination of the transient extensional viscosity of polymer melts

active, Most Current
Buy Now
Organization: ISO
Publication Date: 1 April 2021
Status: active
Page Count: 24
ICS Code (Plastics in general): 83.080.01
scope:

This document specifies the general principles of a method for determining the transient extensional viscosity of polymer melts. The procedure details the measurement of polymer melt specimens stretched uniaxially under conditions of constant strain rate and constant temperature.

The method is capable of measuring the transient extensional viscosity of polymer melts at Hencky strain rates typically in the range 0,01 s-1 to 1 s-1, at Hencky strains up to approximately 4 and at temperatures up to approximately 250 °C (see NOTEs 1 and 2). It is suitable for measuring transient extensional viscosity values typically in the range from approximately 104 Pa⋅s to 107 Pa⋅s (see NOTE 3).

NOTE 1 Hencky strains and strain rates are used (see Clause 3).

NOTE 2 Values of strain, strain rate and temperature outside these limiting values can be attained.

NOTE 3 The operating limit of an instrument, in terms of the lowest transient extensional viscosity values that can be measured, is due to a combination of factors, including the ability of the specimen to maintain its shape during testing and the resolution of the instrument.

Document History

ISO 20965
April 1, 2021
Plastics — Determination of the transient extensional viscosity of polymer melts
This document specifies the general principles of a method for determining the transient extensional viscosity of polymer melts. The procedure details the measurement of polymer melt specimens...
February 15, 2005
Plastics - Determination of the transient extensional viscosity of polymer melts
A description is not available for this item.

References

Advertisement