Composites Reinforced with Thermotropic Liquid Crystal Copolyester Fibers

Abstract

Composites reinforced with thermotropic liquid crystal copolyester fibers (Celanese Vectran) have been studied with regard to fiber properties and fiber matrix adhesion. As-spun (AS) and heat-treated (HT) fibers have been characterized. Heat treatment increases the crystal-to-nematic melting point by 40 C and increases modulus 18% while doubling strength. Composites made with Vectran fibers (HT) should be processed at or below 275 C, because fiber properties are significantly reduced on processing above this temperature, which corresponds to the AS melting point. Keywords: Composites; Liquid crystal; Copolyester; Electron microscope; Fiber surface treatment; Polycarbonate.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1989
Accession Number
ADA211226

Entities

People

  • Richard L. Brady
  • Roger S. Porter

Organizations

  • University of Massachusetts Amherst

Tags

DTIC Thesaurus Topics

  • Composite Materials
  • Copolymers
  • Electron Microscopes
  • Electron Microscopy
  • Electrons
  • Heat Treatment
  • Liquid Crystals
  • Massachusetts
  • Materials Processing
  • Melting Point
  • Microscopes
  • Microscopy
  • Military Research
  • Polymers
  • Surface Finishing
  • Toughness
  • United States

Fields of Study

  • Materials science

Readers

  • Mathematics or Statistics
  • Polymer Science and Engineering.
  • Polymer Science and Technology

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene