飞机用膨化聚四氟乙烯材料加速老化试验及寿命评估研究  

Accelerated Aging Test and Life Prediction of e-PTFE for Aircraft

作　　者：杨雪梅[1] 朱子旻 尹文华 YANG Xue-mei;ZHU Zi-min;YIN Wen-hua(Shanghai Aircraft Design and Research Institute,Shanghai 201210,China;Guangzhou Synthetic Materials Research Institute Co.Ltd.,Guangzhou 510665,Guangdong,China)

机构地区：[1]上海飞机设计研究院,上海201210 [2]广州合成材料研究院有限公司,广东广州510665

出　　处：《合成材料老化与应用》2023年第5期1-3,共3页Synthetic Materials Aging and Application

摘　　要：采用双向拉伸工艺制备了国产高强型膨化聚四氟乙烯密封材料,通过热循环试验和热空气老化试验对其老化性能进行研究。结果表明,经过热循环试验后该材料的体积保留率为89%,拉伸强度提高至原来的109%。从SEM图片可以看出,材料的节点密度有所提高,网状结构更为致密。热空气老化试验结果表明,在常温25℃下贮存时,该材料的贮存寿命超过20年,在目标使用温度条件下的寿命达到33.1年,满足民用飞机使用要求,可实现装机应用。The high strength e-PTFE tape is prepared independently by a bi-axial tension process.The aging performance is investigated by heat cycle tests and thermal oxidation aging tests.The results show the volume retention is 89%,and the tensile strength increases to 109%.According to SEM pictures the node density increases,and the mesh structure is more dense.The thermal oxidation aging tests show that the storage life is over 20 years when stored at 25℃.The service life under the target service temperature can reach 33.1 years,which meets the service requirements of civil aircraft and can be used in civil aircrafts.

关 键 词：膨化聚四氟乙烯 拉伸强度 加速老化 寿命 

分 类 号：TB324[一般工业技术—材料科学与工程]