Journal
JOURNAL OF COMPOSITE MATERIALS
Volume 43, Issue 23, Pages 2717-2725Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/0021998309345338
Keywords
carbon fiber; contact angle; single fiber pull-out; interfacial shear strength
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Funding
- Shanghai Second Polytechnic University [JD208001]
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The quality of interfacial interaction is dictated by the surface chemistry of the carbon fibers and the composition of the matrix. The composition of polystyrene was modified by the addition of maleic anhydride (MAH)-grafted polystyrene (MAH-g-polystyrene). The surface properties of the various matrix formulations were characterized by contact angle. Carbon fibers were modified by oxidation in nitric acid. The surface composition of the carbon fibers was characterized. The interaction between modified polystyrene and the carbon fibers was studied by single fiber pull-out tests. The best adhesion behavior was achieved between polystyrene containing grafted MAH and nitric acid oxidation carbon fibers. The addition of MAH-g-polystyrene to the unmodified polystyrene caused the interfacial shear strength to increase. The apparent interfacial shear strength of this fiber-matrix combination allowed for the utilization of 100% of the yield tensile strength of polystyrene.
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