Effects of Ozone Aging on the Mechanical Properties of SY-20 Silicone Elastomer.

Objective: To evaluate the effects of ozone aging on the mechanical properties of SY-20 silicone elastomer.Methods: Ten test specimens of SY-20 silicone elastomer were prepared,then the major mechanical properties of the elastomer were tested and measured before and after ozone aging according to the national standards,which were they compared with those of MDX-4-4210 in the same condition.Results: The tensile strength,permanent deformation rate and hardness of SY-20 were better than those of MDX-4-4210 silicone elastomer.The elongation at break and tear resistance of SY-20 were similar to those of MDX-4-4210 silicone elastomer.Conclusion: The SY-20 silicone elastomer has suitable mechanical and anti-ozone aging properties.