Effect of Resin Particle on Interfacial Shear Strength of CF/MAPP after Immersion

Abstract

Authors have reported that interfacial shear strength of Carbon Fiber (CF)/Maleic Anhydride grafted PolyPropylene (MAPP) was decreased by immersion for four weeks. As next stage, the purpose of this study is improvement of interfacial shear strength of CF/MAPP after immersion by adding resin particles around fiber. CF and resin particles added CF (RCF) were used as reinforcement. The major axis length of ellipse of resin particles was less than 5μm. In water absorption test, CF/MAPP and RCF/MAPP were immersed in distilled water for four weeks at room temperature. Micro debonding tests of CF/MAPP and RCF/MAPP after immersion were conducted. Fracture morphology of interface between fiber and resin was observed by using scanning electron microscope. As a result, following conclusions are obtained. In case of immersion for four weeks, the interfacial shear strength of RCF/MAPP was greatly increased (70%) compared with that of CF/MAPP. From fracture morphology of RCF/MAPP after immersion, some resin particles on CF surface were found after micro debonding test. Therefore, interfacial shear strength of CF/MAPP after immersion was increased by the effect of resin particles on CF surface.