What are the characteristics of nitrile rubber?
Nitrile rubber is a copolymer formed by polymerization of acrylonitrile and butadiene monomers. It is mainly produced by low-temperature emulsion polymerization. It has excellent oil resistance, high abrasion resistance, good heat resistance, and strong adhesion. Its disadvantages are poor low temperature resistance, poor ozone resistance, poor insulation performance, and slightly lower elasticity.
Nitrile rubber is mainly used to make oil-resistant rubber products. The acrylonitrile content (%) in nitrile rubber has five types: 42-46, 36-41, 31-35, 25-30, 18-24. The more acrylonitrile content, the better the oil resistance, but the cold resistance decreases accordingly. It can be used for a long time in the air at 120°C or in oil at 150°C. In addition, it also has good water resistance, air tightness and excellent bonding properties. Widely used in the manufacture of various oil-resistant rubber products, a variety of oil-resistant gaskets, gaskets, casings, flexible packaging, flexible hoses, printing and dyeing rubber rollers, cable glue materials, etc. It has become indispensable in industries such as automobiles, aviation, petroleum, and copying. The elastic material.
With the increase of ACN content, the polarity of NBR increases, the flexibility of the chain decreases, the interaction force between chains increases, the content of double bonds in the molecular chain decreases, and the degree of saturation increases. This also causes a series of performance changes. Its oil resistance Improved performance, air tightness, and wear resistance, but decreased processability and cold resistance.
