The structure and physical properties of polypropylene and thermoplastic olefin nanocomposites containing nanosilica
The structure and physical properties of polypropylene and thermoplastic olefin nanocomposites containing nanosilica
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DOI：
10.1016/j.polymer.2006.09.014
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发表时间：
2006-10
期刊：
影响因子：
4.6
通讯作者：
Yiqun Liu;M. Kontopoulou
中科院分区：
文献类型：
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作者：
Yiqun Liu;M. Kontopoulou
报道了含纳米二氧化硅的热塑性烯烃共混（TPO）基纳米复合材料的形貌和物理性能。马来化PP的加入改善了填料在PP基体中的分散，而填料只在基体中存在。正如机械性能表征所证明的那样，这种分离的形态导致PP基体的选择性增强而不影响延展性。纳米二氧化硅对TPO/纳米二氧化硅复合材料的拉伸模量、冲击和弯曲性能均有改善，表明TPO/纳米二氧化硅复合材料具有良好的刚度和韧性平衡。在TPOs中加入纳米二氧化硅减少了分散弹性体相的尺寸，这是观察到的冲击强度提高的一个因素。与未改性的填料相比，硅烷改性的纳米二氧化硅在聚合物基体中更有效地分散，从而提高了TPO复合材料的冲击性能。
The morphology and physical properties of thermoplastic olefin blend (TPO) based nanocomposites containing nanosilica are reported. Addition of maleated PP resulted in improved filler dispersion within the PP matrix, where the filler resided exclusively. This separated morphology resulted in selective reinforcement of the PP matrix without compromising ductility, as demonstrated by mechanical property characterization. The tensile moduli, impact and flexural properties of TPO/nanosilica composites showed improvements at low loadings of nanosilica, indicating a good balance of stiffness and toughness. The addition of nanosilica into the TPOs decreased the size of the dispersed elastomer phase, which was a factor in the observed improvements of impact strength. Silane-modified nanosilica dispersed more efficiently in the polymer matrix, giving rise to improved impact properties of the TPO composites, compared to the unmodified filler.