X-ray analysis of heat-treated KEVLAR fibres

Shubha, M and Vijayan, Kalyani (1989) X-ray analysis of heat-treated KEVLAR fibres. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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Abstract

KEVLAR fibres heat-treated at 350xB0;C and 500xB0;C for various13; residence time intervals have been characterized by X-ray methods. At both 350xB0;C and 500xB0;C, heat treatment increases the inter-layer distance in the crystal structure. Pronounced misalignment of crystallites is found to occur. The crystallinity of the fibres exhibit an increase with one hour of exposure to 350xB0;C. Exposure to 50QxB0;C, however, decreases the crystallinity by 40 %. Indications of growth in crystallites and/or reduction in defects are observed. Changes in the relative intensities of reflections have also been found to occur.

Item Type: Monograph (Technical Report)
Uncontrolled Keywords: KEVLAR;Heat-treatment;X-ray diffraction
Subjects: CHEMISTRY AND MATERIALS > Composite Materials
Depositing User: Users 64 not found.
Date Deposited: 02 Nov 2006
Last Modified: 24 May 2010 04:22
URI: http://nal-ir.nal.res.in/id/eprint/3256

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