Abstract
This work deals with the oxygen and argon plasma-induced coating process on the surface of Twaron fibers to obtain a strong interfacial adhesion between the fibers and PPESK matrices. The epoxy coating resins applied in this study were chemically bonded with the plasma pretreated fibers, which was confirmed by X-ray photoelectron spectroscopy (XPS). The fiber surface morphologies and wettability were analyzed by scanning electron microscope (SEM) and dynamic contact angle analysis, respectively. The interfacial adhesion performance of the Twaron fiber-reinforced PPESK composite was measured by interlaminar shear strength (ILSS) and water absorption tests. The fracture mechanisms of composites were examined by SEM. The results indicated that after coating the surface wettability was improved and the ILSS had an increment of 66.1% for oxygen-plasma-induced coating and 68.9% for argon-plasma-induced coating.
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