针状硅酸盐增强氯丁橡胶复合材料的各向异性

Anisotropy of chloroprene rubber composites reinforced with fibrillar silicate

以凹凸棒石（AT）为增强剂，将AT用γ-（甲基丙烯酰氧基）丙基三甲氧基硅烷处理后，通过常规熔体共混方法制备了改性AT（PAT）／氯丁橡胶（CR）复合材料，研究了复合材料的各向异性。结果表明，PAT具有良好的增强效果，由于纳米纤维的取向，复合材料在纤维取向方向和垂直取向方向具有明显的力学性能各向异性；借助混合过程的机械剪切力。PAT解离成直径约为30nm、长度约为500—800nm的纳米纤维分散在CR中；随着PAT用量的增加，PAT在CR中易形成聚集体。

As a reinforcing filler, attapulgite （AT） was modified using silane coupling agent and then directly blended with chloroprene rubber （CB） to prepare modified AT（PAT）/CB composites. The anisotropy of this composites were also studied . The results showed that PAT exhibited the better reinforcement to CB, and the composites showed evident anisotropy in mechanical properties in two different directions duo to the orientation of nanofibers. By mechanical shear force during mixing, PAT was separated into nanofibers with 500 ～ 800 nm in length and 30 nm in diameter in CR. As the loading amount of PAT increased more, some PAT particles tended to agglomerate.