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用熔融插层和丙烯酰胺作为桥联剂成功地制备了三元乙丙橡胶(EPDM)/蒙脱土(MMT)纳米复合材料。X射线衍射(XRD)和透射电镜(TEM)的结果表明,形成的纳米复合材料为剥离型。研究了丙烯酰胺在该纳米复合材料制作中的桥联作用及材料的流变性能。结果表明:选择丙烯酰胺作为桥联剂,完全可以在熔融状态下制备EPDM/MMT纳米复合材料。随着有机粘土加入量的增加,复合体系的粘度降低,加工性能改善,而交联密度在经历最大值后下降。有机蒙脱土具有延迟硫化和促进硫化的双重功效。复合材料的力学性能有了极大的提高,这些性能与蒙脱土的精细分散结构有着密切的关系。
EPDM / montmorillonite (MMT) nanocomposites were successfully prepared by using melt intercalation and acrylamide as bridging agent. The results of X-ray diffraction (XRD) and transmission electron microscopy (TEM) showed that the nanocomposites formed were exfoliated. The bridging effect of acrylamide on the nanocomposites and the rheological behavior of the materials were investigated. The results showed that: EPDM / MMT nanocomposites can be prepared completely in the molten state by choosing acrylamide as bridge agent. As the amount of organoclay added, the viscosity of the composite system decreases, the processability improves, and the crosslink density decreases after experiencing the maximum. Organic montmorillonite has the dual effect of retarding vulcanization and promoting vulcanization. The mechanical properties of composites have been greatly improved, these properties are closely related to the finely dispersed structure of montmorillonite.