摘要
采用差示扫描量热仪(DSC)、热重分析仪(TGA)和热空气老化方法研究了核电站电缆用聚醚醚酮(PEEK)材料的热老化特性,并采用傅里叶变换红外光谱(FTIR)分析了热老化机理。结果表明,PEEK属于抗氧化材料,不宜采用氧化诱导温度(OITP)或氧化诱导时间(OIT)的方法测量其活化能;TGA测得PEEK在10%失重时的活化能为174.8 kJ/mol;热空气老化试验表明,在310℃下PEEK断裂伸长率变为初始值50%时的参考老化时间为189 h,热老化机理主要是芳醚键和芳酮键的断裂。
DSC, TGA and thermal air ageing methods were used to study the thermal ageing characteristics of poly- etheretherketone （PEEK）. The result showed that PEEK is anti-oxidation material and the activation energy cannot be obtained by oxidation induction time （ OIT） or oxidation induction temperature （ OITP） , while the activation ener-gy was 174. 8 kj/mol at 10% lost by TGA. The thermal ageing indicated that the elongation became 50% of the ini-tial value at 310 after about 189h and the thermal ageing mechanism was the break of aryl ether bond and aryl ke-tone bond.
出处
《电线电缆》
2017年第3期26-29,34,共5页
Wire & Cable
关键词
聚醚醚酮
热老化
活化能
PEEK
thermal ageing
activation energy
