The Effect of temperature on the single-fiber fragmentation test with coated carbon fibers

In this study AS4 carbon fibers were coated with poly(hexamethylene adipamide) by two different coating techniques. The glass transition temperature of the interphase was tailored to investigate its influence on the micromechanical behavior. The critical length was measured by means of the single-fi...

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Bibliographic Details
Published in:Composites science and technology 1998-09, Vol.58 (9), p.1487-1496
Main Authors: Varelidis, P.C., McCullough, R.L., Papaspyrides, C.D.
Format: Article
Language:English
Subjects:
A. carbon fiber
A. coating
Applied sciences
B. fragmentation
B. interphase
Composites
Exact sciences and technology
Forms of application and semi-finished materials
Polymer industry, paints, wood
Technology of polymers
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Summary:In this study AS4 carbon fibers were coated with poly(hexamethylene adipamide) by two different coating techniques. The glass transition temperature of the interphase was tailored to investigate its influence on the micromechanical behavior. The critical length was measured by means of the single-fiber fragmentation test over a wide range of temperatures. Experimental results reveal the sensitivity of the critical aspect ratio of the fiber to the glass transition temperature of the coating and also verify the existence of an epoxy interphase of reduced glass transition temperature near the fiber surface. The effect of the thickness of the coating on the critical aspect ratio of the fiber was also investigated. An increase in the thickness of the polyamide coating results in poorer adhesion.
ISSN:0266-3538
1879-1050
DOI:10.1016/S0266-3538(97)00173-5