三元乙丙橡胶室内外老化行为及相关性分析  

Correlation Analysis and the Aging Behaviors of Ethylene-propylene-diene Monomer in Xenon Lamp&Atmospheric Environments

作　　者：熊俊 吴德权 孙茂钧[2] 高瑾 王津梅[2] 杨小奎[2] 周堃[2] 张伦武[2] XIONG Jun;WU De-quan;SUN Mao-jun;GAO Jin;WANG Jin-mei;YANG Xiao-kui;ZHOU Kun;ZHANG Lun-wu(Chengdu Aircraft Industrial(Group)Co.,Ltd,Chengdu 610073,China;Southwest Institute of Technology and Engmeering,Chongqing,400039,China;Corrosion and Protection Center,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]成都飞机工业(集团)有限责任公司,成都610073 [2]西南技术工程研究所,重庆400039 [3]北京科技大学腐蚀与防护中心,北京100083

出　　处：《装备环境工程》2022年第4期138-144,共7页Equipment Environmental Engineering

摘　　要：目的研究三元乙丙橡胶(EPDM)的室内外老化机制及其相关性。方法开展户外拉萨、漠河、吐鲁番、万宁、武汉等站点及室内氙灯加速老化试验,通过分析表观、力学、化学结构等性能,探究EPDM室内外老化行为相关性及加速比。结果EPDM室内外环境中老化规律为,光泽度初期迅速下降,后期趋于稳定;老化初期色差上升,后期逐渐下降。撕裂与拉伸强度在室内与拉萨、漠河地区波动性上升后逐渐下降。红外光谱显示,EPDM室内及拉萨地区样品老化产物都有羰基,但无羟基。结论室内氙灯加速老化试验与拉萨大气暴露试验相关性最高,灰色关联度为0.92。基于一阶动力学方程分析,EPDM室内外老化过程的失光率曲线,氙灯加速老化试验相对于拉萨、吐鲁番、万宁、武汉地区,加速比约为43、82、45、31。To study the indoor and outdoor aging mechanism of EPDM,Ethylene-propylene-diene monomer(EPDM)was carried to outdoor atmospheric environments(Lhasa,Mohe,Turpan,Wanning and Wuhan)for outdoor nature atmosphere exposure tests and indoor xenon lamp accelerating aging test.The aging behaviors of EPDM including surface properties,mechanical properties and chemical structures were analyzed to evaluate the correlation between indoor and outdoor environment aging behaviors and acceleration ratio.The results showed that the aging rule of EPDM indoor and outdoor environment:glossiness reduced firstly and became stable later;chromatic aberration increased early and then decreased;the tensile strength and tear strength properties in Lhasa,Mohe and indoor environment raised fluctuantly and then decreased gradually;the carbonely groups were found in EPDM in Lhasa indoor environment test,while the hydroxy were not discovered there.The aging behaviors of EPDM from indoor environment were high correlated with Lhasa,whose relation coefficient was calculated as 0.92.Based on the first order dynamic equation and the light loss rate curve of EPDM,the acceleration ratios between indoor and Lhasa,Turpan,Wanning and Wuhan tests were calculated to be 43,82,45,31 respectively.

关 键 词：三元乙丙橡胶 环境试验 氙灯加速老化 相关性 动力学模型 

分 类 号：TG333.4[金属学及工艺—金属压力加工]