Development of Autoclavable Polyimides

Abstract

A poly(Diels-Alder) (PDA) resin approach was investigated as a means to achieve autoclavability of high temperature resistant resin/fiber composites under mild fabrication procedures. The results of the study were highly promising and program objectives were achieved. Low void content Type A-S graphite reinforced composites were autoclave fabricated from a PDA resin/fiber prepreg prepared from an acetone:methanol:dioxane varnish. Autoclave conditions were 477 deg K (400 deg F) and 0.7 MN/sq meters (100 psi) for up to two hours duration. After postcure at temperatures up to 589 deg K (600 deg F), the composites demonstrated high initial mechanical properties at temperatures up to 561 deg K (550 deg F). The results from isothermal aging studies in air for 1000 hours indicated potential for long-term (>1000 hours) use at 533 deg K (500 deg F) and shorter-term (up to 1000 hours) at 561 deg K (550 deg F).

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Document Details

Document Type
Technical Report
Publication Date
Nov 21, 1974
Accession Number
ADA307456

Entities

People

  • C. H. Sheppard
  • M. K. O'rell
  • R. Jason Jones
  • R. W. Vaughan

Organizations

  • TRW Inc.

Tags

Communities of Interest

  • Air Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Anhydrides
  • Chemical Synthesis
  • Chemistry
  • Composite Material Fabrication
  • Composite Materials
  • Flexural Properties
  • Flexural Strength
  • Jet Propulsion
  • Magnetic Resonance
  • Materials
  • Materials Laboratories
  • Materials Science
  • Mechanical Properties
  • Military Research
  • Organic Chemistry
  • Physical Properties
  • Test And Evaluation

Readers

  • Polymer Science and Engineering.
  • Reinforced Composite Materials