Moisture Absorption of Coated Composite Materials

Abstract

Moisture diffusion measurements were made for coated and uncoated composite materials. Two substrates were used: T650/1914-4 (a graphite fiber reinforced thermoset epoxy) and AS4/UItem (a graphite fiber reinforced thermoplastic polymer). The specimens were tested uncoated and coated with three polymer coatings MIL-P-53030 Primer, Humiseal 2A53, and 2031 Siloxirane. The coatings generally absorbed more moisture than the specimens and increased the total moisture absorption for the coated parts. For the AS4/Ultem bars, anisotropic diffusion constants were measured, and diffusion occurs in the fiber direction three times faster than transverse to the fibers.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2001
Accession Number
ADA389155

Entities

People

  • Christopher P. Hoppel
  • James F. Newill
  • Melissa A. Klusewitz
  • Steven H. McKnight

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Ground and Sea Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Absorption
  • Coatings
  • Composite Materials
  • Diffusion
  • Diffusion Coefficient
  • Graphitic Materials
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Measurement
  • Military Research
  • Moisture
  • Photographs
  • Thermoplastic Composites
  • Thermoplastic Resins
  • Transverse

Fields of Study

  • Materials science

Readers

  • Reinforced Composite Materials
  • Surface Coatings Technology.