Cyclopentadiene Evolution during Pyrolysis-Gas Chromatography of PMR polyimides

Abstract

The effects of formulated molecular weight (FMW), extent of cure, and cumulative aging on the amount of cyclopentadiene (CPD) evolved from Polymerization of Monomeric Reactants (PMR) polyimides were investigated by pyrolysis-gas chromatography (PY-GC). The PMR polyimides are addition crosslinked resins formed from an aromatic diamine, a diester of an aromatic tetracarboxylic acid and a monoester of 5-norbornene-2, 3-dicarboxylic acid. The PY-GC results were related to the degree of crosslinking and to the thermo- oxidative stability (weight loss) of PMR polyimides. Thus, PY-GC was shown to be a valid technique for the characterization of PMR polyimide resins and composites via correlation of the CPD evolved versus the thermal history of the PMR sample.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1992
Accession Number
ADA253049

Entities

People

  • Richard E. Gluyas
  • William B. Alston
  • William J. Snyder

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Anhydrides
  • Army Aviation
  • Body Weight
  • Chemical Synthesis
  • Chemistry
  • Chromatography
  • Composite Materials
  • Degradation
  • Fiber Reinforced Composites
  • Gas Chromatography
  • Glass Transition Temperature
  • Graphitic Materials
  • High Temperature
  • Mass Spectrometry
  • Materials Science
  • Measurement
  • Transition Temperature

Fields of Study

  • Chemistry

Readers

  • Organic Chemistry
  • Polymer Science and Engineering.