The chemical structure of an elastomer influences its properties, but it does not fully specify a finished grommet's performance. Side groups, comonomer composition and the crosslink network interact with fillers and other additives.
NBR (Nitrile) and styrene-butadiene rubber are different polymer families. Their composition and test results must be identified separately when making a comparison. A statement about one family should not be transferred to the other.
For selection, use data for the proposed compound under relevant temperature and fluid conditions. Compare the properties needed for the application, including dimensional stability and mechanical behavior after exposure. Avoid ranking oxidation resistance from polymer names alone when the formulations and test conditions are not defined.
