聚并苯纳米颗粒与聚丙烯复合制备新型抗静电阻燃材料

Preparation of Antistatic and Flame Retarding Material by Polypropylene Composites Filled with Conductive Polyacenic Semiconductor Material

用聚并苯纳米颗粒作为新型导电填料代替导电炭黑和石墨等,制备出具有抗静电阻燃性能的纳米聚并苯/聚丙烯复合材料.测定了复合材料的渗流转变区,讨论了纳米聚并苯含量对复合材料体积电阻率和表面电阻率的影响.实验结果表明,所制备复合材料的渗流转变发生在纳米聚并苯质量分数为16.7%～28.6%范围内,当纳米聚并苯含量为28.6%时,体积电阻率下降至2.09×107Ω·cm.另外,阻燃性能研究结果表明,当纳米聚并苯质量分数为23.1%时,复合材料在空气中可以自熄,因而可应用于矿井中抗静电阻燃塑料管道.

Nano-particles of polyacenic semiconductor material （PAS） were used as a novel filler instead of carbon black and graphite to prepare PAS/polypropylene（PP） composite, which has antistatic and flame retarding properties. The percolation threshold of PAS/PP composites was confirmed and the phenomenon of percolation threshold was investigated. The effects of content of PAS in the composite on volume resistivity and surface resistivity were discussed in detail. The result of resistivity test shows that the composites were in percolation threshold, when the mass fraction of PAS was between 16.7% and 28.6%. When the mass fraction was 28.6% , the volume resistivity decreased to 2. 09×10^7 Ω ·cm. In addition, flame-retarding property was studied too. Experimental result shows that PAS/PP composites could flame out after ignition in the air when the mass fraction of PAS was more than 23.1% .