NBR has excellent oil resistance. Trans accounts for about 78% of a typical NBR structure. Due to the cyano group in the molecular chain structure of NBR, oil resistance (such as mineral oil, liquid fuel, animal and vegetable oils and solvents) is better than natural rubber, neoprene and styrene-butadiene rubber. Compared with other rubbers, NBR has a wider range of use temperature, its long-term use temperature is 120 °C, and NBR has good low temperature resistance, the lowest glass transition temperature can reach -55 °C.
NBR has good chemical stability and good processing performance, with the increase of its relative density of acrylonitrile content in its structure, the vulcanization rate is accelerated, the tensile strength performance is improved, but the resilience decreases and the cold resistance deteriorates. Since the cyano group in NBR is easily polarized by the electric field, the dielectric performance decreases, and it is semiconductor rubber. NBR can be divided into 5 categories of ultra-high, high, medium-high, medium and low acrylonitrile according to the level of ACN content. There are two production methods: continuous and batch polymerization. The continuous polymerization method is usually used for small varieties and large production volumes, and the consumption is low. The batch polymerization method is suitable for multi-variety and small batch production, and the engineering construction consumption is high
