Influence of the molecular structure of phenylamine antioxidants on anti-migration and anti-aging behavior of high-performance nitrile rubber composites

Abstract The structure of antioxidants significantly affects the anti-migration and thermal-oxidative aging properties nitrile butadiene rubber (NBR) composites, which are crucial for applications in aerospace, biomedical, fuel cell stack sealing industries. findings reveal that migration rate N -(4-anilino phenyl) maleic imide (MC), with a reactive double bond, is only 15.6%, exhibiting best extraction resistance. 2,4,6-Tris-( -1,4-dimethylpentyl- p -phenylenediamino)-1,3,5-triazine (TMPPD), greater weight dendritic structure, follows at 47.7%, while -isopropyl- ′-phenyl- -phenylenediamine (4010NA) performs worst, 77.8%. Furthermore, after exposure, cross-link density NBR composites increases, generating oxygenated substances, such as ethers, aldehydes, acids. addition improves compared to those without any antioxidants. Moreover, 4010NA TMPPD display superior resistance antioxidant MC.