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首页> 外文期刊>Journal of Applied Polymer Science >PP/Clay nanocomposites: Effect of Clay Treatment on Morphology and Dynamic Mechanical Properties
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PP/Clay nanocomposites: Effect of Clay Treatment on Morphology and Dynamic Mechanical Properties

机译：PP /粘土纳米复合材料：粘土处理对形态和动态力学性能的影响

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摘要

The morphology and properties of polypropylene (PP)/clay nanocomposites are described. The melt intercalation of organophilic clay was carried out with a single-screw extruder. The effects of two kinds of treatments of clay are discussed. Maleic anhydride (MAH)-grafted PP was used as a compatibilizer. The expansion of the intergallery distance of the clay was governed by the interaction between the clay treatment and the compatibilizer. In one case, the composites exhibited significantly reduced intensities of diffraction peaks, suggesting partial exfoliation of the clay layers, whereas for the second clay sample, expansion of the gallery height was noted. The mechanical properties of the PP/clay composites showed significant enhancement in their mechanical and thermal properties. About a 35% increase in the tensile modulus and about a 10% increase in the tensile strength were observed. The thermal degradation temperature increased from 270 to about 400degC as a result of the incorporation of clay, and the extent depended on the dispersion of cl.ayin the composite. The most interesting outcome of this study was the changes in morphology for PP/clay compos- ites, which are reported here for the first time. An optical microscopic study revealed that the PP/clay composites could be crystallized at higher temperatures than pure PP and that the morphology was remarkably altered because of the presence of layers of clay.
机译：描述了聚丙烯（PP）/粘土纳米复合材料的形态和性能。用单螺杆挤出机进行亲有机粘土的熔融插层。讨论了两种处理粘土的效果。马来酸酐（MAH）接枝的PP用作增容剂。粘土的晶间间距的扩展由粘土处理剂和增容剂之间的相互作用控制。在一种情况下，复合材料的衍射峰强度显着降低，表明粘土层部分剥落，而对于第二个粘土样品，则注意到了画廊高度的膨胀。 PP /粘土复合材料的机械性能显示出机械和热学性能的显着提高。观察到拉伸模量增加约35％，拉伸强度增加约10％。由于粘土的掺入，热降解温度从270℃升高到约400℃，其程度取决于复合物中cl.ay的分散性。这项研究最有趣的结果是PP /粘土复合材料的形态变化，这是首次在此报道。光学显微镜研究表明，PP /粘土复合材料可以在比纯PP更高的温度下结晶，并且由于存在粘土层，其形态发生了显着变化。

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