Nanocomposites of polystyrene (PS) varying in molecular mass (PS1, PS2) and differently functionalized multiwalled carbon nanotubes (MWCNTs, 0.1–5.0 wt%) were prepared by melt and solution mixing. As fillers, pristine MWCNTs, phenyl propane ester and polystyrene functionalized MWCNTs as well as an in situ synthesized polystyrene masterbatch (DPS) were used. Functionalization procedure and characterization of functionalized MWCNTs are described. Dispersion of MWCNTs as well as electrical, thermal and rheological properties of the nanocomposites were analyzed. Independent of the preparation procedure, the best MWCNT macrodispersion is achieved using DPS. When using solution mixing, the difference in macrodispersion between different MWCNTs is less pronounced in comparison to melt mixing. Solution mixed nanocomposites exhibit lower percolation thresholds in a similar range (PS1 < 0.20 wt%; PS2 < 0.30 wt%) whereas among melt mixed nanocomposites DPS shows the lowest electrical percolation threshold (PS1 0.27 wt%; PS2 0.49 wt%).

通过熔融和溶液混合制备分子量（PS1，PS2）不同的聚苯乙烯（PS）和功能不同的多壁碳纳米管（MWCNT，0.1–5.0 wt％）的纳米复合材料。原始MWCNT，苯丙酸酯和聚苯乙烯官能化的MWCNT作为填充剂，以及原位填充使用合成的聚苯乙烯母料（DPS）。描述了功能化的程序和功能化的MWCNTs的表征。分析了MWCNT的分散性以及纳米复合材料的电，热和流变特性。与制备程序无关，使用DPS可获得最佳的MWCNT宏观分散。当使用溶液混合时，与熔融混合相比，不同MWCNT之间的宏观分散差异不那么明显。溶液混合纳米复合材料在相似范围内表现出较低的渗透阈值（PS1 <0.20 wt％； PS2 <0.30 wt％），而在熔融混合纳米复合材料中，DPS显示出最低的电渗透阈值（PS1 0.27 wt％； PS2 0.49 wt％）。