Liquid Crystal Polyester-Carbon Fiber Composites.

Abstract

Liquid crystal polymers (LCP) have been developed as a thermoplastic matrix for high performance composites. A successful melt impregnation method has been developed which results in the production of continuous carbon fiber (CF) reinforced LCP prepreg tape. Subsequent layup and molding of prepreg into laminates has yielded composites of good quality. Tensile and flexural properties of LCP/CF composites are comparable to those of epoxy/CF composites. LCP/CF composites have better impact resistance than the latter, although epoxy/CF composites possess superior compression and shear strength. LCP/CF composites have good property retention until 200 deg F (67% of room temperature value). Above 200 deg F, mechanical properties are found to decrease significantly. Experimental results indicate that the poor compression and shear strength may be due to the poor interfacial adhesion between the matrix and carbon fiber as well as inadequate toughness of the LCP matrix. Low mechanical property retention at high temperatures may be attributed to the low beta-transition temperature (around 80 deg C) of the LCP matrix material. jg p50

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1984
Accession Number
ADA305120

Entities

People

  • Tai-shung Chung

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Biomedical And Dental Materials
  • Chemistry
  • Composite Materials
  • Flexural Properties
  • Manufacturing
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Polymer Chemistry
  • Polymeric Films
  • Resins
  • Tensile Properties
  • Thermoplastic Resins

Fields of Study

  • Materials science

Readers

  • Allergy and Immunology.
  • Reinforced Composite Materials