摘要
以氟硅液体橡胶作为生胶,R8200气相二氧化硅作为补强填料,苯基三乙酰氧基硅烷为硫化剂,二月桂酸二丁基锡为催化剂制备了室温硫化单组份氟硅密封剂.研究了不同黏度生胶对密封剂力学性能的影响并确定以40Pa·s的氟硅液体橡胶作为基础胶.热空气老化试验结果表明,脱酸型氟硅密封胶在高温热空气老化过程中主要发生热降解老化,增加硫化剂和催化剂的用量都会提高老化速度.耐油试验结果表明,生胶黏度和硫化体系对密封剂耐油性能影响不大,主要由含氟量所决定.
The fluorosilicone liquid rubber was used as the raw rubber, the R8200 fumed silica was used as the reinforcing filler, the phenyl triacetoxysilane was used as the vulcanizing agent, and the dibutyltin dilaurate was used as the catalyst to prepare the room temperature vulcanized one-component fluorosili. cone sealant.The effect of different raw rubber viscosity on sealant mechanical properties was studied and the fluorosilicone liquid rubber with 40Pa·s was determined as the base rubber. The results of hot air ag. ing test show that the deacidified fluorosilicone sealant mainly undergoes thermal degradation aging dur. ing high temperature hot air aging, and increasing the amount of vulcanizing agent and catalyst will in. crease the aging speed.The oil resistance test results show that the viscosity of the raw rubber and the vulcanization system have little effect on the oil resistance of the sealant, which is mainly determined by the fluorine content.
作者
陈天运
赵文斌
吴松华
CHEN Tian-yun;ZHAO Wen-bin;WU Song-hua(AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;Jinxi Research Institute of Chemical Industry,Huludao Liaoning 125000,China)
出处
《粘接》
CAS
2019年第6期5-8,共4页
Adhesion
关键词
氟硅密封胶
生胶黏度
脱酸型
室温硫化
耐高温性能
热老化降解
耐燃油性能
fluorosilicone sealant
viscosity of raw rubber
deacidification type
room temperature vulcaniza. tion
high temperature resistance
heat aging degradation
oil resistance
