M00001249
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ISO 1431-1 5th Edition, August 15, 2012 Rubber, vulcanized or thermoplastic - Resistance to ozone cracking - Part 1: Static and dynamic strain testing
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Availability date: 07/13/2021
Description / Abstract:
This part of ISO 1431 specifies procedures intended for use in
estimating the resistance of vulcanized or thermoplastic rubbers to
cracking when exposed, under static or dynamic tensile strain, to
air containing a definite concentration of ozone and at a definite
temperature in circumstances that exclude the effects of direct
light.
Great caution is necessary in attempting to relate standard test
results to service performance since the relative ozone resistance
of different rubbers can vary markedly depending on the conditions,
especially ozone concentration and temperature. In addition, tests
are carried out on thin test pieces deformed in tension and the
significance of attack for articles in service can be quite
different owing to the effects of size and of the type and
magnitude of the deformation. Explanatory notes on the nature of
ozone cracking are given in Annex A.
Reference and alternative methods for determining the ozone
concentration are described in ISO 1431-3.