Carbon Fiber Reinforced Copoly(Phthalazinone Hydroquinone Ether Ketone) Composites With Enhanced Processability and Mechanical Properties

ABSTRACT Continuous carbon fiber reinforced thermoplastic resin matrix composites have attracted considerable attention in aerospace, automotive industry, wind energy, and environmental protection fields. In this work, a novel carbon fiber/copoly(phthalazinone hydroquinone ether ketone) (CF/PPHEK) composite was successfully prepared via a simple and efficient solution impregnation process. The composite exhibits excellent processability, good thermal stability, and outstanding mechanical properties. As the content of the phthalazinone structure in PPHEK increases, the mechanical properties of CF/PPHEK first increase and then decrease. Among them, the maximum flexural strength reaches 1157 MPa and the interlaminar shear strength is 70.3 MPa. Investigation of the processing conditions reveals that satisfactory performance can be achieved even under conditions of low temperature, low pressure, and short holding time. This study aims to provide a simple and feasible preparation method for the fabrication of easily processable and high‐performance continuous fiber‐reinforced poly(aryl ether ketone) (PAEK) composites.