硅酸盐纳米短纤维增强三元乙丙橡胶复合材料的结构与性能  

Structure and properties of silicate nanofiber reinforced ethylene propylene diene monomer composites

作　　者：苏丽丽[1] 张立群[2] 田明[1] 

机构地区：[1]北京化工大学碳纤维及功能高分子教育部重点实验室,北京100029 [2]北京化工大学北京市新型高分子材料制备与加工重点实验室,北京100029

出　　处：《合成橡胶工业》2009年第5期395-399,共5页China Synthetic Rubber Industry

基　　金：国家"八六三"计划资助项目(2002AA334050);北京市新星计划资助项目

摘　　要：用硅烷偶联剂改性针状硅酸盐(FS)与三元乙丙橡胶(EPDM)机械共混,制备了EPDM/改性FS复合材料,研究了FS在EPDM中的分散性,考察了偶联剂和改性FS用量、FS所含自由水对复合材料力学性能和各向异性的影响。结果表明,经过偶联剂改性的FS能够解离成纳米纤维均匀分散于EPDM中,每100份FS的偶联剂最佳用量为24份;EPDM/改性FS复合材料具有短纤维增强橡胶复合材料的应力-应变特征和力学性能的各向异性,且随改性FS和偶联剂的用量增加,这种力学行为更加明显;FS中所含自由水对复合材料的常温和高温拉伸性能有明显影响。Ehylene propylene dienemonomer （EPDM） /fibrillar silicate （FS） nanocomposites were prepared by mechanically blending EPDM with FS surface-modified by silane coupling agent. The dispersion of FS in EPDM was studied. The effects of the content of silane coupling agent and modified FS, free water contained in FS on the mechanical properties and its anisotropy were investigated. The results showed that modified FS could be discomposed inlo nanofibers and dispersed well in EPDM matrix. The optintrn content of the silane coupling agent should be 24 phr in every 100 phr FS. EPDM/modified FS composites exhibited the sinilar stresstrain behavior and obvious anisotropy in mechanical properties to short fiber reinforced robber composites and these mechanical behaviors of the composites would become more visible as the bading a-nount of modified FS and silane coupling agent increased. The flee water contained in FS had obvious effecton the tensile properties of composites when tested at 23℃ and 120℃.

关 键 词：针状硅酸盐 纳米短纤维 硅烷偶联剂 表面改性 三元乙丙橡胶 力学性能 各向异性 

分 类 号：TB332[一般工业技术—材料科学与工程]