A family of polyarylene sulfide polymers is being developed by Phillips Petroleum Company as thermoplastic engineering resins. These resins have high temperature mechanical performance, good mechanical strength, and good solvent resistance. The newest member of this family of resins is PAS-2^tm amorphous polyarylene sulfide. One potential application for this amorphous resin is as a matrix for high performance com posites. The amorphous polyarylene sulfide resin has been formed into unidirectional pre preg tapes. These tapes have been molded into laminates of excellent quality. Recently, new levels of performance in mechanical properties and processing have been achieved.