摘要
利用硅氮聚合物作交联剂使双组分缩合型室温硫化硅橡胶在不需要催化剂存在下硫化，通过对硫化胶老化后的热失重、交联密度和力学性能的测定，表明这种硫化胶的耐温性能由２００℃提高到３５０℃．对硫化胶的降解动力学研究表明：降解反应活化能由７０ＫＪ／ｍｏｌ提高到３３０ＫＪ／ｍｏｌ，这是由于消除了端基引发的主链降解．
he conventional two-component condensation -type RTV silicone rubbervulcanized by novel crosslinking agent of polysilazane was studied. The experimental results showed that RTV silicone rubber samples vulcanics by theKH--CL crosslinking agent had the resistant temperature up to 350 ℃and theactivation energy of thermal degradation reaction of the vulcanizates increased to330KJ/mol. This Aught be attributed the elimination of the degradation ofsilo-cane chain initiated by the residual catalyst and the silanol groups in thevulcanizates.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1994年第5期573-577,共5页
Acta Polymerica Sinica
基金
国家自然科学基金
关键词
硅氮聚合物
硫化硅橡胶
热稳定性
Crosslinking agent of polysilazane, Silicone rubber, Thermal stability, Degradation of siloxane chain, KH- CL Crosslinking agent.
