Synthesis of Improved Moisture Resistant Polymers.

Abstract

The use of difluoromaleimide-capped prepolymers to provide improved moisture resistant polymers was investigated. Six different prepolymer formulations were prepared by two different methods. One method utilized the PMR approach to polyimides and the second method employed the normal condensation route to provide fully imidized prepolymers. Polymer spec mens cured at 505K (4500F) exhibited adequate long-term stability in air at 477K (400 F). Moisture absorption studies were conducted on one polymer formulation. Neat polymer specimens exhibited weight gains of up to 2% (w/w) after exposure to 100% relative humidity at 344K (l60 F) for 400 hours. (MM)

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Document Details

Document Type
Technical Report
Publication Date
Mar 15, 1979
Accession Number
ADA305011

Entities

People

  • M. K. O'rell

Tags

Communities of Interest

  • Air Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Alcohols
  • Anhydrides
  • Body Weight
  • Chemical Synthesis
  • Chemistry
  • Composite Materials
  • Epoxy Resins
  • Infrared Spectra
  • Jet Propulsion
  • Materials
  • Materials Laboratories
  • Materials Science
  • Melting Point
  • Organic Chemistry
  • Resins
  • Sodium Hydroxide

Fields of Study

  • Materials science

Readers

  • Polymer Science and Engineering.