Accession Number:

ADA136558

Title:

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

Descriptive Note:

Final rept. Sep 80-Jun 82,

Corporate Author:

TUFTS UNIV MEDFORD MASS

Personal Author(s):

Report Date:

1983-08-01

Pagination or Media Count:

66.0

Abstract:

A new method is explored to improve mechanical properties of carbongraphite CG fiber reinforced composites through chemical modification of the fiber surface. CG 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 CG 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 dynescm. Compared to unmodified fibers, plasma treated CG fiber resulted in substantial improvements in both interlaminar shear and flexural strengths when incorporated uniaxially in epoxy matrices.

Subject Categories:

  • Laminates and Composite Materials
  • Plastics
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE