Polybutadiene acrylonitrile

Solid rocket motor fuel copolymer

Polybutadiene acrylonitrile (PBAN) copolymer, also noted as polybutadiene—acrylic acid—acrylonitrile terpolymer is a copolymer compound used most frequently as a rocket propellant fuel mixed with ammonium perchlorate oxidizer. It was the binder formulation widely used on the 1960s–1970s big boosters. It is also notably used in NASA's Space Launch System, likely reusing the design from its Space Shuttle counterpart.

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