Accession Number:

ADA248741

Title:

Dielectric Properties of Polymer Matrix Composites Prepared from Conductive Polymer Treated Fabrics

Descriptive Note:

Final rept.

Corporate Author:

ARMY LAB COMMAND WATERTOWN MA MATERIAL TECHNOLOGY LAB

Report Date:

1992-02-01

Pagination or Media Count:

21.0

Abstract:

The dielectric functions of polypyrrole-treated polyester fabric and polypyrrole-treated S-glass fabric in polyester resin matrix composites have been calculated from free-space reflectance data in the 26.5 GHz to 40 GHz range. The data indicate that for the polypyrrole-treated polyester fabric polyester resin composites, the imaginary part of the dielectric function can be described by a conductivity over frequency relationship. On the other hand, the real part of the dielectric function for these composites changes much less than the imaginary part when the conductivity of the fabric is increased. Similar results were found for the polypyrrole-treated S-glass in polyester resin composites. However, the real part of the dielectric function for these composites increases faster than for the polyester fabric composites. Scanning electron microscopy SEM indicated that the difference in behavior between the treated polyesterpolyester and the treated S-glasspolyester composites can be due in part to nonuniform coating of the glass fabric. In contrast, the real part of the dielectric functions of several composites fabricated using S-glass woven roving with more uniform coatings were no larger than composites of the untreated rovings.

Subject Categories:

  • Laminates and Composite Materials
  • Textiles
  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE