热氧老化对辐照三元乙丙橡胶密封材料性能影响及寿命评估  

Effects of thermal oxygen ageing on properties of irradiated EPDM sealing materials and life assessment

作　　者：周城 陈夏 樊亚勤 金凯峰 李建喜 ZHOU Cheng;CHEN Xia;FAN Yaqin;JIN Kaifeng;LI Jianxi(CGN-DELTA(Taicang)Testing Technology Co.,Ltd.,Taicang 215400,China;CGN Advanced Materials Technology(Suzhou)Co.,Ltd.,Taicang 215400,China)

机构地区：[1]中广核三角洲(太仓)检测技术有限公司,江苏太仓215400 [2]中广核高新核材科技(苏州)有限公司,江苏太仓215400

出　　处：《绝缘材料》2023年第1期23-28,共6页Insulating Materials

摘　　要：研究了热氧老化对辐照后三元乙丙橡胶(EPDM)材料性能的影响,并通过分析压缩永久变形率随时间的变化规律,对其理论使用寿命进行评估。结果表明:随着老化时间不断增加与老化温度不断升高,辐照后的EPDM老化越来越严重,羰基含量越来越高,压缩永久变形与压缩应力松弛越来越大;扫描电镜结果表明,老化过程中EPDM降解严重;利用阿伦尼乌斯方程计算得出,辐照后的EPDM在50℃条件下的理论寿命为7.58年。The effect of thermal oxygen ageing on the properties of irradiated ethylene propylene diene rubber(EPDM)materials were analyzed, and its theoretical service life was evaluated by analyzing the change rule of compression permanent deformation rate with time. The results show that with the increase of ageing time and ageing temperature, the irradiated EPDM is aged more and more serious, the carbonyl content becomes higher and higher, and the compression set and compression stress relaxation become greater and greater. The SEM results show that the EPDM degrade seriously during ageing process. According to Arrhenius equation, the theoretical life of the irradiated EPDM is 7.58 years at 50℃.

关 键 词：三元乙丙橡胶 热氧-辐照老化 压缩永久变形 寿命评估 

分 类 号：TM215[一般工业技术—材料科学与工程]