The Effect of Thermal Treatment on the Interface Strength in Graphite/ Polycarbonate Composites

Abstract

Pronounced effects of thermal treatment on the properties of graphite/ Polycarbonate composites have been demonstrated and studied. At a 20 percent volume loading of random-in-plane, discontinuous fiber, both specimen strength and modulus were found to be very sensitive to initial molding temperature and to subsequent heat treatments. Scanning electron micrographs of tensile fracture surfaces show that the matrix adheres to the fibers more tenaciously and in greater quantities as the tensile strength increases. Preliminary diffraction evidence indicates that the polycarbonate has epitaxially crystallized on and around the graphite fibers in the case of the annealed samples. The increase in composite strength are attributed to increases in interface strength which arise from better wetting and partial crystallization of the interface.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1970
Accession Number
AD0869601

Entities

People

  • F. S. Cheng
  • J. L. Kardos
  • T. L. Tolbert

Organizations

  • Monsanto

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Biomedical And Dental Materials
  • Composite Materials
  • Glass Transition Temperature
  • Governments
  • Heat Treatment
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Mechanical Properties
  • Military Research
  • Plastics
  • Polymeric Films
  • Resins
  • Tensile Strength
  • Thermoplastic Composites
  • Transition Temperature

Fields of Study

  • Materials science

Readers

  • Reinforced Composite Materials
  • Surface Coatings Technology.
  • Thin Film Deposition Science.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene