In this work, antistatic, high-performance composites of poly (ether ether ketone) (PEEK) and concentrations of 0.5–7 vol% expanded graphite (EG) were fabricated via twin-screw extrusion and injection moulding at mould temperatures of 200°C. The morphological, electrical, rheological, thermal, mechanical, and wear properties of the composites were investigated. Scanning electron microscope (SEM) images indicate that distribution and dispersion of EG platelets in the PEEK matrix are enhanced at higher EG loadings. The electrical conductivity of the composites with 5 vol% of EG exhibits a sharp rise in the electrical conductivity range of antistatic materials because of the formation of conductive paths. The formation of a three-dimensional EG network led to a rapid increase in the storage modulus of the melt of the 2 vol% of EG-loaded composite at a frequency of 0.1 rad/s and temperature of 370°C. The neat PEEK and composites containing 0.5–5 vol% EG indicated a cold-crystallisation peak in the first heating scan of a non-isothermal differential scan calorimetry (DSC) test and their crystallinity degrees changed slightly. However, after removing their thermal and stress histories, the EG platelets promoted nucleation and increased the PEEK crystallinity remarkably, indicating that annealing of the PEEK composites can improve their mechanical performance. The neat PEEK exhibits the standard tensile and flexural stress-strain behaviour of thermoplastics, and the composites exhibit elastic behaviour initially followed by a weak plastic deformation before fracture. The addition of 5 vol% of EG to PEEK increased the tensile and flexural modulus from 3.84 and 3.55 GPa to 4.15 and 4.40 GPa, decreased the strength from 96.73 and 156.41 MPa to 62 and 118.19 MPa, and the elongation at break from 27.09 and 12.9% to 4 and 4.6%, respectively. The wear resistance of the composite containing 3 vol% EG was enhanced by 37% compared with the neat PEEK.

在这项工作中，通过双螺杆挤出和注塑在 200°C 的模具温度下制造了聚醚醚酮 (PEEK) 和浓度为 0.5-7 vol% 的膨胀石墨 (EG) 的抗静电高性能复合材料. 研究了复合材料的形态、电学、流变学、热学、机械和磨损性能。扫描电子显微镜 (SEM) 图像表明，EG 血小板在 PEEK 基质中的分布和分散在较高的 EG 负载量下得到增强。由于导电路径的形成，含有 5 vol% EG 的复合材料的电导率在抗静电材料的电导率范围内急剧上升。三维 EG 网络的形成导致 2 vol% EG 负载复合材料在 0.1 rad/s 频率和 370°C 温度下熔体的储能模量迅速增加。纯 PEEK 和含有 0.5-5 vol% EG 的复合材料在非等温差示扫描量热法 (DSC) 测试的第一次加热扫描中显示出冷结晶峰，并且它们的结晶度略有变化。然而，在去除它们的热和应力历史后，EG 片晶促进了成核并显着提高了 PEEK 的结晶度，表明 PEEK 复合材料的退火可以提高其机械性能。纯 PEEK 表现出热塑性塑料的标准拉伸和弯曲应力应变行为，并且复合材料最初表现出弹性行为，然后在断裂前发生弱塑性变形。在 PEEK 中加入 5 vol% EG 使 PEEK 的拉伸和弯曲模量从 3.84 和 3.55 GPa 增加到 4.15 和 4.40 GPa，强度从 96.73 和 156.41 MPa 降低到 62 和 118.19 MPa，断裂伸长率从 3.84 和 3.55 GPa 增加到 29.9 和 127.19 MPa。 % 分别为 4% 和 4.6%。与纯 PEEK 相比，含有 3 vol% EG 的复合材料的耐磨性提高了 37%。