THERMOGRAVIMETRY OF PHENOL-FORMALDEHYDE POLYCONDENSATES. PART 3. CARBON/GRAPHITE CLOTH REINFORCED COMPOSITES TO 1400C

Abstract

Carbon and graphite cloth reinforced phenolic composites find ablative thermal protection uses as nose tips, heat shields, and rocket nozzle elements. Weight kinetics are used in predicting the performance of these and related materials. The most general source of the necessary kinetic parameters is thermogravimetry. Kinetic parameters n, A, and E were empirically calculated for the pyrolysis of phenolic molding, phenolic/carbon cloth, and phenolic/ graphite cloth materials. The empirical kinetic parameters predicted thermograms within 2% residual weight of the parent one. Of three typical bands of disagreement, the largest usually occurred within the third band near 800C. A two-step phenolic/carbon cloth thermogram was in part due to cloth pyrolysis with probable synergistic resin interaction. The graphite cloth was relatively inactive for the phenolic/graphite cloth composite.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1970
Accession Number
AD0709884

Entities

People

  • R. W. Farmer

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Ablative Materials
  • Accuracy
  • Body Weight
  • Composite Materials
  • Computers
  • Gas Turbine Nozzles
  • Graphitic Materials
  • Heat Shields
  • Laminates
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Nose Tips
  • Plastics
  • Pyrolysis
  • Reinforced Plastics
  • Resins

Fields of Study

  • Materials science

Readers

  • Combustion science or combustion engineering.
  • Reinforced Composite Materials