Material Specification
Synthetic copolymer elastomers provide a highly cost-effective solution for applications requiring resistance to petroleum-based oils and fuels. Elastomeric products molded from nbr nitrile rubber are widely utilized in automotive, industrial, and aeronautical systems for gaskets, seals, and hoses. This polymer exhibits excellent resistance to mineral oils, hydraulic fluids, and grease due to the polar acrylonitrile groups in its structure.
The compound also exhibits high resistance to water and dilute acids, which expands its utility in industrial pumping environments.
Chemical Composition
Acrylonitrile content determines the balance between oil resistance and low-temperature flexibility. In standard grades of nbr nitrile rubber, this proportion ranges from eighteen to fifty percent. Higher nitrile content improves the resistance of the elastomer to hydrocarbons but raises the glass transition temperature, making the material brittle in cold environments.
Mechanical Parameter
Tensile strength and abrasion resistance are exceptionally high, making the copolymer suitable for dynamic sealing applications. High wear resistance allows nbr nitrile rubber to function in rotating shafts and reciprocating pistons without excessive wear. Compression set is minimal when properly vulcanized, ensuring long-term seal efficiency.
Degradation Vulnerability
Exposure to ozone, weathering, and ultraviolet radiation causes rapid surface cracking and structural breakdown. In environments with atmospheric exposure, nbr nitrile rubber requires the addition of antiozonants or a protective coating to prevent premature deterioration. Engineers avoid specifying this polymer for applications involving exposure to ketones, strong acids, or chlorinated hydrocarbons.
