以异丁胺基多面齐聚倍半硅氧烷(Aminopropyllsobutyl POSS,POSS-NH2)作为插层剂对累托石(Rectorite,REC)进行有机化处理,并应用于三元乙丙橡胶(Ethylene propylene diene monomer,EPDM)体系,采用机械共混法制备了POSS-NH2自组装改性累托石/三元乙丙橡胶(POSS-REC/EPDM)复合材料.考察了POSS-REC在橡胶体系中的剥离行为、复合材料的微观结构、力学性能及热学性能.结果表明:POSS-REC添加量较低时形成较均一的插层-剥离型纳米复合材料;POSS-REC添加量为3％(质量分数)时,复合材料力学性能和热学性能最佳,与纯EP-DM橡胶相比,其拉伸强度提高245.5％,断裂伸长率提高113.3％,热分解温度提高7.7℃.
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