Study on Compression Moulding of Continuous Long Quartz Fiber-reinforced PEEK Composite Bar

摘要

The moulding process of 3D-braided PEEK/LQ prepreg is studied by optical microscope, scanning electron microscope and tensile testing machine in this paper. The mechanical property of composite with different fiber content is analyzed as well. The results show that a better impregnation of moulded PEEK resin to the continuous long quartz fiber is obtainedat the moulding temperature of 380°C. The internal porosity of composite bar decreases as the holding pressure increases. The densest microstructure and no hole is observed inside the composite bar after adding venting inmoulding process. The tensile and shear strength increase at first and then decrease as the quartz fiber content increases from 50% to 70%. The tensile and shear strength are maximum when the quartz fiber content is 60%.