Development of an Impact-and Solvent-Resistant Thermoplastic Composite Matrix.
AEROTHERM ACUREX CORP MOUNTAIN VIEW CA
Pagination or Media Count:
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
- Laminates and Composite Materials
- Polymer Chemistry