具有“沙袋”结构的PP/EPDM/CB导电复合材料的增韧机理研究

TOUGHENING MECHANISM OF CONDUCTIVE PP/EPDM/CB COMPOSITE WITH "SANDBAG" STRUCTURE

研究了含"沙袋"结构的聚丙烯(PP)/(乙烯/丙烯/二烯)共聚物(EPDM)/炭黑(CB)三元导电复合材料的增韧机理。结果表明,含"沙袋"结构的导电复合材料体积电导率和缺口冲击强度同步增长的原因在于其特殊的增韧方式,在外力冲击过程中,PP基体受CB粒子的拉伸成纤以及纤维的伸长与断裂是这种特殊三元导电复合材料吸收冲击能量的主要手段之一。

The toughening mechanism of polypropylene （PP）/earbon black （CB）/ethylene propylene diene monomer （EPDM ） ternary conductive composite with ＂sandbag＂ is analyzed. The results show that the simultaneous increase of the conductivity and notched impact strength of the ternary conductive composite with ＂sandbag＂ structure is attributed to the special toughening way. During the impact process, the extension and breaking of the PP microfibrils in-situ formed by the stretching of CB particles is one of the main methods to absorb impact energy for the special ternary conductive composite.