Accession Number : ADA305202

Title :   Development of an Impact-and Solvent-Resistant Thermoplastic Composite Matrix.

Descriptive Note : Contractor rept.,

Corporate Author : AEROTHERM ACUREX CORP MOUNTAIN VIEW CA

Personal Author(s) : Delano, C. B. ; Kiskiras, C. J.

PDF Url : ADA305202

Report Date : APR 1984

Pagination or Media Count : 76

Abstract : Several aliphatic-aromatic thermoplastic polymers in neat resin form have been identified which hold promise as solvent-resistant matrices for application in composites for aerospace vehicles. During this initial 24-month technical effort, 16 compositions representing polyimides and two types of polybenzimidazoles were synthesized, molded, and characterized. Polyimides from pyromellitic dianhydride with 1,6-hexane- and 1,8-octanediamines and polybenzimidazoles from 3,3',4,4'-tetra- amino biphenyl with suberic and sebacic acids and 1,12-dodecanedicarboxylic acid demonstrated excellent unstressed resistance to chloroform, acetone, and tricresyl phosphate. N-arylenepolybenzimidazoles and polyimides from 3,3' ,4,4'-benzo- phenonetetracarboxylic dianhydride with aliphatic diamines were susceptible to chloroform absorption. Modification of the aliphatic polyimides from 3,3' ,4,4'-benzophenonetetracarboxylic dianhydride and 1,6-hexane- and 1,8-octanediamine, with m-phenylenediamine, reduced the chloroform susceptibility to acceptable values. jg p8

Descriptors :   *COMPOSITE MATERIALS, *RESISTANCE, *MATRIX MATERIALS, *THERMOPLASTIC RESINS, *SOLVENTS, POLYMERS, ANHYDRIDES, ALIPHATIC COMPOUNDS, AMINES, AEROSPACE CRAFT, AROMATIC COMPOUNDS, ABSORPTION, ACETONES, CARBOXYLIC ACIDS, HEXANES, CHLOROFORM, POLYIMIDE RESINS, BIPHENYL, SEBACIC ACID, POLYBENZIMIDAZOLE.

Subject Categories : Laminates and Composite Materials
      Polymer Chemistry
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE