BS ISO 20965:2005
Plastics - Determination of the transient extensional viscosity of polymer melts

Standard No.

BS ISO 20965:2005

Release Date

2005

Published By

British Standards Institution (BSI)

Status

Be replaced 2021-10

Replace By

BS ISO 20965:2021

Latest

BS ISO 20965:2021

Replace

03/105580 DC:2003

Scope

ISO 20965:2005 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. It is suitable for measuring transient extensional viscosity values typically in the range from approximately 104 Pa.s to 107 Pa.s.

BS ISO 20965:2005 history

• 2021 BS ISO 20965:2021 Plastics. Determination of the transient extensional viscosity of polymer melts
• 2005 BS ISO 20965:2005 Plastics - Determination of the transient extensional viscosity of polymer melts