Accession Number:

ADA305120

Title:

Liquid Crystal Polyester-Carbon Fiber Composites.

Descriptive Note:

Final rept.,

Corporate Author:

CELANESE RESEARCH CO SUMMIT NJ

Personal Author(s):

Report Date:

1984-05-01

Pagination or Media Count:

50.0

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 LCPCF composites are comparable to those of epoxyCF composites. LCPCF composites have better impact resistance than the latter, although epoxyCF composites possess superior compression and shear strength. LCPCF 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

Subject Categories:

  • Laminates and Composite Materials
  • Polymer Chemistry
  • Textiles
  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE