聚丙烯-石英砂-石墨三元复合材料的制备及性能研究

Preparation of Polypropylene-Quartz Sand-Graphite Ternary Composites and Research on Their Properties

以二氧化硅(SiO_(2))和石墨(Graphite)为填料,聚丙烯(PP)为基体,通过机械球磨混合,高温加热成浆料,模压成型制备了聚丙烯-二氧化硅-石墨三元复合材料(PSG),并对复合材料的抗压强度和表面电阻率进行了测试,研究了石英砂和石墨的含量对PSG性能的影响。研究结果表明:石墨的添加可以提高PSG的电导率,当石墨含量达到14%时,PSG的表面电阻率为1.9×10^(8)Ω,具有抗静电性能;随着石英砂的添加,PSG的抗压强度表现为先增加后减少的变化规律,当石英砂的含量为65 wt%时,PSG的抗压强度达到最大值73 MPa,与聚丙烯-石墨复合材料相比提高了1.3倍。

With SiO_(2)and graphite as fillers and polypropylene(PP)as the matrix,after they are mixed by mechanical milling,heated into slurry at high temperature and molded,PP-SiO_(2)-graphite(PSG)composites are prepared.This paper tests the compressive strength and surface resistivity of composites,and studies the effect of the content of quartz sand and graphite on the properties of PSG.The results show that the addition of graphite can improve the conductivity of PSG,and the surface resistivity of PSG is 1.9×10^(8)Ωwhen the content of graphite reaches 14%,which has anti-static properties,and that the compressive strength of PSG increases first and then decreases with the addition of quartz sand,and the compressive strength of PSG reaches a maximum value of 73 MPa when the content of quartz sand is 65 wt%,which is almost 1.3 times higher than that of PP-graphite composites.