Effect of Interfacial Property on CF/PP Continuous Fiber Reinforcement Thermoplastic Composite

摘要

The interfacial properties in continuous fiber reinforced thermoplastic composites can be characterized by the wetting ability and chemical interaction between fiber and matrix surfaces. Wetting ability would affect resin impregnation state during molding while chemical reaction affects composite strength.In this study, continuous carbon fiber reinforced thermoplastics (CFRTP) were fabricated by using intermediate material, and the effects of the PP with different MFR and maleated PP, and the quantities of a sizing agent on the interfacial adhesion and the impregnation behavior of the resin into the fiber bundles were investigated.To examine the interfacial adhesion, micro droplet test with single fiber was carried out. It was clarified that the interfacial adhesion was improved by a increase in the content of sizing agent, a decrease in MFR of PP, and the modification of PP by maleic acid. As the results of cross-sectional observation to investigate the impregnate state, the unimpregnated ratio decreased with an increase in the molding time and a decrease in the content of sizing agent. On the other hand, despite of the molding time and the content of sizing agent, the impregnation state was deteriorated by the modification of PP. From the results of the contact angle, the wetting ability of the CF/maleic PP was worse compared with that of CF/PP.