聚丙烯接枝马来酸酐修饰碳纳米管增强聚丙烯复合材料的制备及性能

采用混合溶剂的溶液法技术,对聚丙烯接枝马来酸酐(PP-g-MAH)包覆碳纳米管(MWNTs)与聚丙烯(PP)纳米复合材料的电学和力学性能进行了研究。PP-g-MAH包覆MWNTs在二甲苯溶液中呈现良好的分散性,红外结果表明,酸化碳纳米管后表面官能团如羟基、羧基与马来酸酐发生氢键作用。场发射扫描电镜(FESEM)也证明了PP-g-MAH修饰MWNTs在PP基体中分散良好,并且相容性也得到了明显改善。复合材料的拉伸强度和电导率都有较大的提高,其中导电性相比未处理碳管/聚丙烯提高了两个数量级。

PP-g-MAH Modified MWNTs Reinforced the Mechanical and Electrical Properties of Polypropylene Nanocomposite

A study on the electrical and mechanical properties of polypropylene(PP) based nanocomposites with polypropyle-graft-maleic Anhydride(PP-g-MAH) modified multi-walled carbon nanotubes(MWNTs) was carried out.Fourier transform infrared spectroscopy(FT-IR),Raman spectroscopy,field emission scanning electron microscope(FE-SEM),differential scanning calorimeter(DSC) and thermogravimetric analysis(TGA) were used to study the structure,thermal and mechanical properties of the composites.FT-IR results indicate the carboxyl groups appear on the surface of MWNTs.FE-SEM results show that treated MWNTs also disperses well in the PP matrix and has a improved adhesion with PP.The tensile strength and the conductivity of the PP-g-MAH-MWNT/PP composite are increased,especially the conductivity increasing two orders of magnitude compared to PP composites with untreated MWNTs.