Knowra Nitrile rubber Nitrile rubber Nitrile rubber is a synthetic copolymer of acrylonitrile and butadiene. Its acrylonitrile content gives it strong resistance to oils and fuels, while influencing flexibility and low-temperature performance.
Acrylonitrile : A colorless, volatile organic compound used as a monomer in polymers including nitrile rubber. Its proportion in the copolymer largely determines resistance to oils and fuels.
Polymer : A large molecule built from repeating structural units linked into chains or networks. Nitrile rubber is a polymer whose chain composition controls its behavior.
O-ring : A ring-shaped elastomer seal placed in a groove to prevent fluid or gas leakage. Nitrile rubber is a common O-ring material for oil and fuel service.
Natural rubber : An elastomer obtained primarily from the latex of rubber trees and composed mainly of cis-1,4-polyisoprene. Natural rubber offers excellent elasticity but generally resists oils less well.
1,3-Butadiene : A gaseous organic compound used as a monomer in synthetic rubbers and other polymers. It supplies the flexible rubber backbone that acrylonitrile modifies.
Cross-link : A chemical bond or group of bonds connecting separate polymer chains. Cross-links help nitrile rubber retain shape and elasticity under use.
Fuel hose : A flexible hose designed to carry gasoline, diesel, or other fuels. Nitrile rubber’s fuel resistance makes it useful in hose linings and components.
Ethylene propylene diene monomer rubber : A synthetic elastomer made from ethylene, propylene, and a small amount of a diene. EPDM withstands weathering and hot water better, but performs poorly in oils.
Copolymer : A polymer formed from two or more different kinds of monomer. Nitrile rubber’s defining structure combines acrylonitrile and butadiene units.
Oil resistance : A material’s ability to resist swelling, softening, or degradation when exposed to oils. Nitrile rubber resists many oils because its polar acrylonitrile units limit hydrocarbon uptake.
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