Abstract
Polypropylene/fumed silica composites were prepared via melt mixing using a twin-screw co-rotating extruder. To improve the dispersion degree of the fumed silica, γ-aminopropyl triethoxy silane (KH-550) was used as silane coupling agent. The PP composites which obtained different fumed silica content were prepared by melt-mixing process. Then composites mechanical properties were measured by the crystal polarized light microscopy (PLM), hardness, tensile testing and so on. The results indicate that fumed silica could toughen PP resin and mechanical properties of composites were optimum when fumed silica content was 1.5 wt%.
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