20/30388647 DC - BS ISO 6914. Rubber, vulcanized or thermoplastic. Determination of ageing characteristics by measurement of stress relaxation in tension

20/30388647 DC

BS ISO 6914. Rubber, vulcanized or thermoplastic. Determination of ageing characteristics by measurement of stress relaxation in tension

Status : Current, Draft for public comment   Published : April 2020

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This document describes three methods for the measurement of the change of stress in a test piece at a given elongation for the purpose of determining the ageing characteristics of a rubber.

  • Method A is intended for measurement under continuous strain conditions.

  • Method B is the preferred method for measurement under intermittent strain conditions.

  • Method C is an alternative to method B for measurement under intermittent strain conditions in which the test piece is removed from the ageing environment for measurement of the stress at standard laboratory temperature.

Measurements at a single elevated ageing temperature can be used for quality control purposes as a measure of heat-ageing resistance. Measurements at a number of temperatures can be used for research and development purposes to estimate long-term ageing characteristics in accordance with the procedures described in ISO 11346.

Tests under continuous and intermittent strain conditions measure the results of different processes, and hence do not give the same results. The results of the intermittent methods B and C also cannot be expected to be the same as they use different test conditions.




Standard Number20/30388647 DC
TitleBS ISO 6914. Rubber, vulcanized or thermoplastic. Determination of ageing characteristics by measurement of stress relaxation in tension
StatusCurrent, Draft for public comment
Publication Date14 April 2020
Normative References(Required to achieve compliance to this standard)ISO 23529, ISO 18899:2013, ISO 188:2011, ISO 5893:2019
Informative References(Provided for Information)ISO 11346, ISO 3384-1
International RelationshipsISO/DIS 6914
Draft Expiry Date07 June 2020
DescriptorsTest specimens, Thermal testing, Testing conditions, Ageing tests, Vulcanized rubber, Accelerated testing, Plastics and rubber technology, Elongation, Stress relaxation, Thermoplastic polymers, Rubber, Stress, Heat ageing tests, Strain elongation, Strain measurement, Test equipment
ICS83.060
Title in FrenchCaoutchouc vulcanisé ou thermoplastique — Détermination des caractéristiques de vieillissement par mesurage de la contrainte de relaxation en traction
CommitteePRI/22
PublisherBSI
FormatA4
DeliveryYes
Pages18
File Size326 KB
NotesWarning: this draft is not current beyond its expiry date for comments.
Price£20.00


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