三元乙丙橡胶的热氧老化及寿命预测  

Thermal Oxygen Aging and Life Prediction of EPDM

作　　者：陶玲[1,2] 刘国钧 程璐[1,2] 罗能凤 王进[1,2] TAO Ling;LIU Guo-jun;CHENG Lu;LUO Neng-feng;WANG Jin(Zhuzhou Times New Materia lTechnology Co.,Ltd.,Zhuzhou 412007,China;Zhuzhou Inspection Center of Polymeric Materials and Products for Railways,Zhuzhou 412007,China)

机构地区：[1]株洲时代新材料科技股份有限公司,湖南株洲412007 [2]株洲轨道交通高分子材料及制品质量监督检验中心,湖南株洲412007

出　　处：《特种橡胶制品》2022年第6期60-65,共6页Special Purpose Rubber Products

基　　金：湖南省市场监督管理局科技计划项目2021KJJH20。

摘　　要：以拉断伸长率和压缩永久变形为评价性能,应用阿累尼乌斯方程对三元乙丙橡胶进行了寿命预测。研究了热氧老化对三元乙丙橡胶物理力学性能和分子结构的影响。结果表明,该三元乙丙橡胶在高温下具有优异的拉伸性能,高温会导致其他物理力学性能劣化、交联密度增大和分子链断裂。该三元乙丙橡胶在压缩状态下的贮存寿命为9.3年。应用阿累尼乌斯方程进行寿命预测时,测试性能、临界值和试验温度的选择直接影响结果的准确性,必须根据实际使用情况综合考虑、谨慎选择。The effects of thermal oxygen ageing on the mechanical properties and molecular structure of EPDM were studied.The life of EPDM was predicted by Arrhenius equation with elongation at break and compression set as evaluation properties.The results showed that the EPDM had excellent tensile strength at high temperature,which will lead to the deterioration of other mechanical properties,the increase of crosslinking density and the fracture of molecular chain.The predicted storage life of the EPDM under compression was 9.3 years.The selection of evaluation property,critical value and temperature directly affects the accuracy of the predicted results when applying Arrhenius equation to life prediction.It must be considered comprehensively and carefully according to the practical application.

关 键 词：三元乙丙橡胶 热氧老化 寿命预测 阿累尼乌斯方程 

分 类 号：TQ330.14[化学工程—橡胶工业]