GSD-01硅橡胶热空气加速试验及贮存寿命预估研究  

Study on hot air accelerated test and storage life prediction of GSD-01 silicone rubber

作　　者：周源 杨根[2] 池旭辉[2] 张峰涛[2] Zhou Yuan;Yang Gen;Chi Xuhui;Zhang Fengtao(College of Weaponry Engineering,Naval University of Engineering,Wuhan 430033,China;Science and Technology on Aerospace Chemical Power Laboratory,Hubei Institute of Aerospace Chemotechnology,Xiangyang 441003,China)

机构地区：[1]海军工程大学兵器工程学院,湖北武汉430033 [2]湖北航天化学技术研究所航天化学动力技术重点实验室,湖北襄阳441003

出　　处：《化学推进剂与高分子材料》2022年第2期72-77,共6页Chemical Propellants & Polymeric Materials

摘　　要：采用衰减全反射红外光谱(ATR–IR)分析确定合适的加速老化试验温度,以热空气高温加速试验方法,得到GSD–01硅橡胶压缩永久变形随加速温度和时间的变化规律,通过回归分析计算其在25℃下的贮存寿命。结果表明:GSD–01硅橡胶在100~150℃的加速温度下遵循相似的老化机理,其压缩永久变形随老化温度提高和时间延长逐渐增大,具有明显的单调变化规律;以压缩永久变形达到25%为该发动机密封失效的临界值,保守预估GSD–01硅橡胶25℃贮存寿命下限约为44a,同时计算得到100~150℃加速老化相对25℃贮存的加速系数介于78~574。The suitable accelerated aging test temperature was confirmed by using the attenuated total reflection infrared spectroscopy(ATR-IR) analysis.The variation rules of compression set of GSD-01 silicone rubber with the accelerated temperature and time were obtained by the hot air high temperature accelerated test method,its storage life at 25℃ was calculated by regression analysis.The results show that GSD-01 silicone rubber follows the similar aging mechanism at the accelerated temperature of 100~150℃,its compression set gradually increases with the increase of the aging temperature and time,which has obvious monotonic variation rule.Taking the compression set of 25% as the critical value of the seal failure of the engine,it is conservatively estimated that the lower limit of the storage life of GSD-01 silicone rubber at 25℃ is about 44a.Meanwhile,the acceleration coefficient of accelerated aging in 100~150℃ relative to storage at 25℃ was calculated to be 78~574.

关 键 词：硅橡胶 加速试验 压缩永久变形 寿命 

分 类 号：TQ333.93[化学工程—橡胶工业]