Accession Number : ADA304444

Title :   Characterization of PMR Polyimides - Correlation of Ester Impurities with Composite Properties,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER

Personal Author(s) : Lauver, R. W. ; Vannucci, R. D.

PDF Url : ADA304444

Report Date : MAY 1979

Pagination or Media Count : 11

Abstract : The presumed relationship of chemical impurities to final composite properties is the rationale for most chemical characterization studies. This study examines this relationship for PMR-polyimide resin. Ester/acid solutions of one monomer were aged at selected temperatures and chemical changes were monitored spectroscopically. At selected intervals, graphite fiber reinforced composite panels were fabricated. Changes in resin processing characteristics and composite properties were determined. The correlation of these data are discussed as are related characterization studies of PMR-polyimide resin. jg p2

Descriptors :   *COMPOSITE MATERIALS, *IMPURITIES, *ESTERS, *POLYIMIDE RESINS, SOLUTIONS(MIXTURES), CHEMICALS, POLYMERS, PROCESSING, FIBER REINFORCED COMPOSITES, FABRICATION, GRAPHITE, CORRELATION, MONOMERS, PLASTICS, ACIDS.

Subject Categories : Polymer Chemistry
      Organic Chemistry
      Laminates and Composite Materials
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE