中文摘要：

通过对添加石墨的聚四氟乙烯（PTFE）复合材料进行拉伸试验,考察石墨的添加量对改性复合材料拉伸强度的影响.得到了试样的拉伸强度及其拉伸性能曲线.试验结果表明,石墨的添加量对改性PTFE的性能影响很大.当石墨体积分数为24%时,改性PTFE复合材料的拉伸强度较纯聚四氟乙烯降低了48%,仅为12.2 MPa;随着石墨含量的继续增加,改性PTFE复合材料的力学性能持续明显降低。

英文摘要：

Tensile test on PTFE composites filled with graphite was carried out to investigate the effect of the graphite content on the tensile strength of modified composite materials. The tensile performance curve and tensile strength were obtained. The results showed that the mechanical properties of modified PTFE composites were influenced significantly by the graphite content. When the volume fraction of graphite is 24%,the tensile strength of the modified PTFE composites decreased by 48%,which was only 12. 2 MPa. With the increase of the graphite content,the mechanical properties of the modified PTFE composites continued to decrease obviously.