Efeito do envelhecimento por ozônio nas propriedades mecânicas da borracha natural

Abstract

Aiming to verify the effect of an antiozonant additive rubber, samples were exposed for different periods in the ozone chamber and removed for verification of surface modifications and tensile tests. It was possible to observe the occurrence of macroscopic and microscopic cracking. As the exposure time increased, the occurrence of micro and macro fractures in the rubber also increased. In the tensile tests, the maximum load and elongation were determined and the drastic reduction of both was observed with the increase of the time of exposure to the ozone.