摘要
基于市面上普遍存在的金属氧化物掺杂氟硅耐热密封剂的报道,以α,ω-二羟基聚甲基三氟丙基硅氧烷共聚物为生胶,气相二氧化硅为填料,金属氧化物为耐热剂,制备了脱氢型室温硫化氟硅密封剂。通过热空气老化法评价了稀土氧化物和氧化铁掺杂氟硅耐热密封剂在250、300℃的耐热性,结果显示,在较低温度下(250℃),稀土金属氧化物掺杂氟硅耐热密封剂的耐热效果更好;而在300℃的环境中,氧化铁掺杂氟硅耐热密封剂的耐热性能优于稀土金属氧化物。从普适性和经济性角度分析,氧化铁掺杂氟硅耐热密封剂有着较广泛的使用价值。
Dehydrogenated curing fluorosilicone sealant is prepared at room temperature by mixing fluorosilicone liquid rubber,fumed silica,and metal oxide.Then heat resistance performance is investigated by thermal aging experiment at different temperatures(250℃and 300℃).It is revealed that the heat resistance performance of rare earth metal oxide based fluorosilicone sealant is better than that of iron oxide at 250℃.However,when the temperature goes up to 300℃,the iron oxide based fluorosilicone sealant's heat resistance performance is better than the rare earth metal oxide's.Concerning the universality and economy of sealant,the iron oxide based fluorosilicone sealant possesses a wider application area.
作者
高元峰
鲍传磊
徐振坤
郑梓强
吴松华
GAO Yuanfeng;BAO Chuanlei;XU Zhenkun;ZHENG Ziqiang;WU Songhua(Institute of Rubber and Sealing,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China)
出处
《科技导报》
CAS
CSCD
北大核心
2021年第9期56-60,共5页
Science & Technology Review
关键词
氟硅密封剂
耐高温性能
氧化铁
稀土金属氧化物
耐热剂
fluorosilicone sealant
iron oxide
rare earth metal oxide
heat resistance performance
heat resistant agent
