Plasma Modification of Graphite Fibers and Its Effect on Composite Properties.

Abstract

A new method is explored to improve mechanical properties of carbon/graphite (C/G) fiber reinforced composites through chemical modification of the fiber surface. C/G fiber surface was altered by plasma polymerization of acrylonitrile. Modified surface was characterized with ESCA, FTIR, SEM, and wetting angle measurements, using a pyrolytic graphite block, as a model surface to C/G fiber. Acrylonitrile plasma treatment permanently changed the graphite surface to a more polar one with a crtical surface energy for wetting, gamma c, of 54 dynes/cm. Compared to unmodified fibers, plasma treated C/G fiber resulted in substantial improvements in both interlaminar shear and flexural strengths when incorporated uniaxially in epoxy matrices.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1983
Accession Number
ADA136558

Entities

People

  • G. Dagli
  • N. H. Sung

Organizations

  • Tufts University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acrylonitrile Polymers
  • Alkenes
  • Chemical Synthesis
  • Chemistry
  • Composite Material Fabrication
  • Composite Materials
  • Fabrication
  • Fiber Reinforced Composites
  • Flexural Strength
  • Graphitic Materials
  • Laminates
  • Materials Processing
  • Materials Science
  • Mechanical Working
  • Mechanics
  • Organic Chemistry
  • Tensile Strength

Fields of Study

  • Materials science

Readers

  • Polymer Science and Technology
  • Structural Health Monitoring of Composite Structures.
  • Thin Film Deposition Science.