Accession Number : ADA305378

Title :   An Investigation into the Injection Molding of PMR-15 Polymide.

Descriptive Note : Final rept.,

Corporate Author : TEXAS A AND M UNIV COLLEGE STATION DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Colaluca, Mario A.

PDF Url : ADA305378

Report Date : 1982

Pagination or Media Count : 33

Abstract : The excellent high temperature mechanical properties of polyimide resins have lead to their increasing use in high performance applications. Present employment of this material includes fiber-reinforced composite structures, bearings, seals, valve seats, bushings, piston rings, electrical connectors, switch components, abrasive wheel binders, aircraft interior panels, circuit boards, and jet engine parts including engine cowlings and high speed fan blades 1-6. Both thermoplastic and thermosetting polyimides are commercially available. The thermosetting materials were developed first and are much more widely used than the newer thermoplastic resins. Early thermosetting polyimide systems were based on condensation reactions. They were difficult to process, requiring the use of high boiling point solvents. Solvent residues and reaction by-products lead to void formation and premature failure of fabricated parts.

Descriptors :   *MECHANICAL PROPERTIES, *INJECTION MOLDING, *POLYIMIDE RESINS, ENGINE COMPONENTS, MATERIALS, HIGH TEMPERATURE, FIBER REINFORCED COMPOSITES, FAILURE, FABRICATION, COMPOSITE STRUCTURES, JET ENGINES, VOIDS, INTERNAL, WHEELS, THERMOPLASTIC RESINS, SOLVENTS, PARTS, BEARINGS, VALVES, CIRCUIT BOARDS, BINDERS, AIRCRAFT PANELS, RESIDUES, SWITCHES, THERMOSETTING PLASTICS, SEATS, BUSHINGS, ABRASIVES, BOILING POINT, CONDENSATION REACTIONS, PISTON RINGS.

Subject Categories : Laminates and Composite Materials
      Properties of Metals and Alloys
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE