Acrylonitrile is a key monomer for various polymeric consumer products. Acrylonitrile most important application is for the production of polymer for textile fibers. ABS is the most widely used engineering (i.e. metal replacing) plastic. Because of its reactivity, acrylonitrile can be used as a chemical intermediate. Some Acrylonitrile co polymers have found specialty applications where good gas barrier properties are required along with strength and high impact resistance. A growing specialty application for acrylonitrile is in the manufacture of carbon fibers for high performance application in the air craft, defense, and aerospace industries. These applications include rocket engine nozzles, rocket nose cones, and structural components for aircraft and orbital vehicles where light weight and high strength are needed.