Components formed of blow molded thermoplastic compositions are described. The blow molded thermoplastic compositions exhibit high strength and flexibility. Methods for forming the thermoplastic compositions are also described. Formation methods include dynamic vulcanization of a composition that includes an impact modifier dispersed throughout a polyarylene sulfide. A crosslinking agent is combined with the other components of the composition following dispersal of the impact modifier. The crosslinking agent reacts with the impact modifier to form crosslinks within and among the polymer chains of the impact modifier. The compositions can exhibit excellent physical characteristics at extreme temperatures and can be used to form, e.g., tubular member such as pipes and hoses and fibers.

A process method utilizing customized, specifically-shaped pieces of reticulated polyurethane foam (RPF) to fill an aircraft fuel tank or tank compartment to provide ignition mitigation and prevent explosion in the tank. The process involves inserting the shaped pieces of RPF through existing access ports into a fuel tank in order to fill the tank, excepting minimal planned void spaces. This process effects ignition mitigation by acting as an ignition blocker, mechanically interfering with the compression wave that precedes the flame front in an explosion, and changing the vaporous mixture above the fuel level (ullage) in the tank. The foam pieces are assembled and fitted together throughout the tank in a pattern that replicates the shape of the tank. After the foam insertion is complete, the fuel tank is filled with purging fluid, drained through a filter until no debris is found, and the new maximum fuel quantity is recalibrated.