动态硫化PP／EPDM性能对共混工艺的依赖及其机理研究

本文通过对一步法和母料法两种共混工艺制备的动态硫化ＰＰ／ＥＰＤＭ力学性能、拉伸形变特性，熔体流动行为，交联程度和微观结构等的表征和分析，研究了动态硫化ＰＰ／ＥＰＤＭ性能对共混工艺的依赖及其作用机理。结果显示，在保证有效地提高材料加工流动性的前提下，母料法能有效地抑制动态硫化中ＰＰ的降解，提高ＥＰＤＭ的交联程度，粒度均匀性和分散均匀性，从而强化材料的增韧效果以及其它力学性能，并提高材料性能的均匀性。

The Effect of Blending Methods on the Properties of Dynamic Vulcanisel PP/EPDM Pvodvds and ist Relalcd

The effect of blending methods on the properties of dynamic PP and EPDM were dynamically vulcanized through one step extrusion and two step extrusion.The resultant products were examined for their mechanical properties,tensile break behaviour,and degree of vulcanization,Melt rheology was also studied,and the structure of the vulcanized products was observed microscopically.Results of tained showed that compared with one Step extrusion,the two step extrusion proved tobe beneficial to inhabiting PP degsadation,thus increasing the degree of vulcanigation.It was also noticed thara better system of PP/EPDM, with improved distsibution of EPDM in PP,was observable with the two step extrusion products,leadling to impoved impact toughness ansong ather mechanical propestes.The only beneficial effeet of one step extsusion was noted for its melt flow rheology.