G105硅橡胶老化性能试验研究  

Experimental Study on Aging Performance of G105 Silicone Rubber

作　　者：戴超 郑健[1] 许进升[1] 黄薇[1] 贺宏博 DAI Chao;ZHENG Jian;XU Jinsheng;HUANG Wei;HE Hongbo(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Inner Mongolia Institute of Mechanical Power,Hohhot 010000,China)

机构地区：[1]南京理工大学机械工程学院,南京210094 [2]内蒙动力机械研究所,呼和浩特010000

出　　处：《装备环境工程》2024年第10期46-52,共7页Equipment Environmental Engineering

基　　金：国家自然科学基金(52105107);北强基金(BQJJ202308)。

摘　　要：目的建立橡胶老化特性指标与老化时间的动力学方程,对不同预压缩量下硅橡胶密封组件的贮存寿命进行预估,探究不同预压缩量和温度对硅橡胶密封组件老化性能的影响。方法以不同预压缩量和温度为变量,选取压缩永久变形为老化指标,对硅橡胶试样进行热氧老化试验。依据试验数据,建立老化反应速率常数与温度的回归方程,研究不同温度和不同预压缩量对橡胶老化反应速率的影响,建立压缩永久变形和老化时间的动力学方程,对不同预压缩量下的橡胶贮存寿命进行预估。结果建立了硅橡胶贮存寿命预测的老化动力学方程,对硅橡胶在不同预压缩量下的贮存寿命进行了预估。预压缩量由12%增加到45%时,硅橡胶密封组件贮存寿命由24.8 a下降到14.2 a。结论预压缩量对橡胶老化性能具有显著影响作用,在实际使用时应选择合理的预压缩量。The work aims to establish a regression equation between aging characteristic index and aging time of rubber to predict the storage life of silicone rubber sealing components under different pre-compression amounts and investigate the effects of different pre-compression amounts and temperatures on the aging performance of silicone rubber sealing components.With different pre-compression amounts and temperaturesas variables,and permanent compression deformation as the aging characteristic index,thethermal oxygen aging test was carried out to silicone rubber specimens.According to the test data,a regression equation between aging reaction rate and temperature was established.The effect of different temperatures and pre-compression amounts on the aging reaction rate of the rubber was studied.The aging kinetics equations of permanent compression deformation and aging time were established,and the storage life of rubber under different test temperatures and pre-compression amounts was estimated.The aging dynamic equation for predicting the storage life of silicone rubber was established,and the storage life of silicone rubber under different pre-compression amounts was predicted.The pre-compression amount increased from 12%to 45%,and the storage life of silicone rubber sealing components decreased from 24.8 a to 14.2 a.The pre-compression amount has a significant impact on the aging performance of rubber.Therefore,a reasonable amount of pre-compression should be selected in practical use.

关 键 词：固体火箭发动机 硅橡胶 热氧老化 预压缩量 寿命预估 

分 类 号：TQ330.7[化学工程—橡胶工业]