Abstract

Abstract Investigations based on the stress relaxation of natural rubber in ozonized atmospheres have produced relationships between cracking, ozone concentration and ozone air velocity. It is shown that at low ozone air velocities the rate of cracking is critically dependent upon the air speed value. The occurrence of discrepancies arising between results from testing chambers operating under identical conditions of concentration, temperature and light intensity is demonstrated at the end of the paper. A brief mention of similar work has been published but it is felt that more detail may help in the standardization of ozone testing procedure.

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