BS 903-A44:1995 Physical testing of rubber - Part A44. Method of determination of resistance to ozone cracking (dynamic strain test)
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This part of ISO 1431 specifies a method intended for use in estimating the resistance of vulcanized or thermoplastic rubbers to cracking when exposed, under 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 may be quite different owing to the effects of size and of the type and magnitude of deformation. Explanatory notes on the nature of ozone cracking are given in informative annex A.
Methods for determining resistance to ozone cracking under static strain conditions are specified in ISO 1431-1. A reference method for estimating the ozone concentration will form the subject of ISO 1431-3.
Primary Item Type:
British Standard
Identifiers:
ICS 83.060
ISBN 0580236552
Language:
English
Subject Keywords:
Splitting tests; Testing conditions; Synthetic rubber; Physical testing; Reports; Vulcanized rubber; Chemical-resistance tests; Thermoplastic polymers; Dynamic testing; Specimen preparation; Test equipment; Tensile splitting tests; Ozone; Tensile strain; Natural rubber; Plastics and rubber technology; Tensile testing; Chemical analysis and testing; Test specimens
