Thermally Stable Polyimides from Solutions on Monomeric Reactants.

Abstract

A method for preparing thermally stable resin-fiber-reinforced composites by using solutions of appropriate monomers is described. Solutions containing a dimethyl ester of an aryl tetracarboxylic acid, the monomethyl ester of nadic acid, and an aryl diamine were used to impregnate graphite fibers. Composites fabricated from these prepregs exhibited excellent thermooxidative stability and retention of mechanical properties at 315 C (600 deg F). These results compare favorably to those obtained from composites made from amide-acid prepolymers capped with reactive alicyclic rings. Monomeric solutions provide excellent shelf life and improved solubility compared to amide-acid prepolymer solutions.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1972
Accession Number
ADA309272

Entities

People

  • George R. Lightsey
  • Peter Delvigs
  • Tito T. Serafini

Organizations

  • Glenn Research Center

Tags

DTIC Thesaurus Topics

  • Alcohols
  • Body Weight
  • Chemistry
  • Composite Material Fabrication
  • Composite Materials
  • Fiber Reinforced Composites
  • Flexural Strength
  • Graphitic Materials
  • High Temperature
  • Materials Processing
  • Materials Science
  • Mechanical Properties
  • Modulus Of Elasticity
  • Molecular Weight
  • Shear Strength
  • Shelf Life
  • Thermal Stability

Fields of Study

  • Chemistry
  • Materials science

Readers

  • Analytical Chemistry
  • Polymer Science and Technology
  • Reinforced Composite Materials