改性蒙脱土硅橡胶阻燃复合材料的制备

Preparation of the flame retardants composites of modified-montmorillonite and silicone rubber

研究了分别采用十六烷基三甲基溴化铵(CTAB)和磷酸三丁酯作为插层剂改性的有机蒙脱土(OMMT)的阻燃效果及抑制熔滴物产生的效果,发现单独添加OMMT的硅橡胶阻燃复合材料都有抑制熔滴物产生,减少烟和灰尘生成的作用,但是不具备阻燃的效果;将OMMT与100份Al(OH)3和40份Fe2O3进行复配,发现只需添加3份的有机蒙脱土一(OMMT-1)或5份有机蒙脱土二(OMMT-2)即可达到垂直燃烧FV-0级别;热重分析表明,OMMT的热稳定性能比蒙脱土原土好,OMMT-1的比OMMT-2的好。

The flame-retardant effect and droplet material inhibiting ability of OMMTs,which have been modified by intercalators cetyl trimethyl ammonium bromide（CTAB）and tributyl phosphate respectively,were studied.The results show that the silicone rubber composites containing OMMT alone can both inhibited droplet material,decreased smoke and dust,but aren＇t flame-retardant.The results also showed that the composites containing 100 quotas Al（OH）3,40 quotas Fe2O3 and 3 quotas OMMT-1 or 5 quotas OMMT2 can reach FV-0 degree in vertical burning test.Thermal gravimetric analysis（TGA） showed that,thermal stability of OMMTs was better than MMT＇s,and OMMT-1＇s was better than OMMT-2＇s.