PES/CF/PET纤维混杂复合材料的力学性能

Mechanical properties of PES/CF/PET fiber hybrid

选用PES纤维作为基体,碳纤维(CF)作为增强体,聚对苯二甲酸乙二醇酯(PET)纤维作为黏合剂,利用特殊的铺层结构制备出一种低密度、易加工、可回收的复合材料。采用正交试验设计研究了PES纤维质量分数、热压温度、压力和时间对复合材料拉伸性能的影响,并对材料的断裂机制进行了分析。结果表明:PES纤维质量分数是影响复合材料拉伸强度的最主要因素,其次是热压时间,热压温度和压力的影响最小;当PES纤维质量分数为55%、热压温度为270℃、压力为25 MPa、时间为50 min时,PES/CF/PET纤维混杂复合材料具有良好的力学性能,拉伸强度达到59.526 MPa,拉伸模量达到1.576 GPa,断裂伸长率达到6.950%;复合材料拉伸断裂机制主要表现为纤维的断裂。

Using PES fiber as the matrix,carbon fiber(CF)as the reinforcement,and polyethylene terephthalate(PET)fiber as the adhesive,a low density,easy to process,and recyclable composite material is prepared using a special lay-up structure.The effects of PES fiber content,hot-pressing temperature,pressure and time on the tensile properties of the composite are investigated using an orthogonal experimental design,and the fracture mechanism of the material is analyzed.The results show that the PES fiber content is the most important factor affecting the tensile strength of the composites,fllowed by the hot-pressing time,and the hot-pressing temperature and pressure have the least effect.When the PES fiber content is 55%,and hot-pressing at 270℃for 50 min with pressure of 25 MPa,the PES/CF/PET fiber hybrid composite has good mechanical properties with the tensile strength reaching 59.526 MPa,the tensile modulus reaching 1.576 GPa,and the elongation at break reaching 6.950%.The tensile fracture mechanism of the composites mainly shows the fracture of fibers.