Abstract
Short carbon fiber reinforced PEEK (CF/PEEK) composite materials with the advantages of excellent mechanical properties and easy processing, have been widely applied in the fields of aeronautics and astronautics, automotive engineering, and so on. However, their development in microinjection molding is hindered by the incompatibility between excellent plasticity and high mechanical properties. Herein, strength-plasticity synergetic CF/PEEK composites are prepared by adjusting the melt fluidity and crystallization behaviors, based on PEEK with different melt flow rate (MFR) and T800 carbon fiber. The rheological results showed that the melt viscosity of CF/PEEK composite was negatively related to the MFR of PEEK. Moreover, the mechanical properties of composites were increased by the crystallinity of PEEKs with high MFR. This work presents strength-plasticity synergetic CF/PEEK composites suitable for microinjection molding thin-walled and intricate components, offering new opportunities for next-generation portable electronic.
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