碳纤维增强PP/EVA复合材料力学性能研究

Mechanical Properties of Carbon Fiber Reinforced PP/EVA Composite

将碳纤维(C)与聚丙烯(PP)、乙烯-乙酸乙烯共聚物(EVA)共混,制备了PP/EVA/C复合材料。研究了碳纤维用量以及偶联剂改性、酸刻蚀并偶联剂改性的碳纤维对PP/EVA复合材料力学性能、水接触角和断面微观形貌的影响。结果表明:碳纤维添加量为30份时,PP/EVA/C复合材料的力学性能较好;酸刻蚀并偶联剂改性的碳纤维(SSiC)增强效果优于单独偶联剂改性的碳纤维。与添加碳纤维30份的PP/EVA/C复合材料相比,PP/EVA/SSiC复合材料的拉伸强度、弯曲强度分别提高了6.26,7.20 MPa,但冲击强度略有降低。

The PP/EVA/C composite was prepared by blending the carbon fiber （C） with PP and EVA. The effects of the different amount of carbon fiber, carbon fiber modified by coupling agent, carbon fiber modified by both acid etching and coupling agent on the mechanical properties, water contact angle and the fracture surface microstructure of composites were investigated. The results show that when the amount of carbon fiber is 30 phr,the mechanical of PP/EVA/C composite is better. The reinforcement effect of the carbon fiber modified by both acid etching and coupling agent is better than that of the carbon fiber modified by coupling agent in the PP/EVA composites. Compared with the PP/EVA/C composites containing 30 phr carbon fiber, the tensile strength and flexural strength of the PP/EVA/SSiC composites increase respectively by 6. 26 MPa and 7.20 MPa, however, the impact strength decreases slightly.