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以碳纳米管(CNT)作为导电组分,以乙烯-辛烯共聚物(POE)作为增韧剂,通过熔融复合制备PP/POE/CNT三组分纳米复合材料,研究微观结构与电导率和缺口冲击强度的关系。实验结果表明:PP/CNT两组分纳米复合材料由电绝缘体向半导体的逾渗转变发生在CNT质量含量为2~3%时。POE的加入延迟了纳米复合材料的逾渗转变,这说明POE的存在延缓了纳米复合材料中导电通路的形成。重要的是,30%POE赋予了导电纳米复合材料超高韧性。
The CNTs as the conductive component and the ethylene-octene copolymer (POE) as the toughening agent were used to prepare PP / POE / CNT three-component nanocomposites by melt compaction. The effects of microstructure and conductivity Notched impact strength of the relationship. The experimental results show that the percolation transition from electrical insulator to semiconductor takes place when the mass fraction of CNTs is 2-3% for the PP / CNT two-component nanocomposites. The addition of POE delays the percolation transformation of the nanocomposites, indicating that the presence of POE delays the formation of conductive pathways in the nanocomposites. Importantly, 30% POE confers super toughness on conductive nanocomposites.