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首页> 外文会议>AMD-vol.257; American Society of Mechanical Engineers(ASME) International Mechanical Engineering Congress and Exposition; 20061105-10; Chicago,IL(US) >INSTRUMENTED INDENTATION ON INTERCALATED CLAY REINFORCED POLYPROPYLENE NANOCOMPOSITES
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INSTRUMENTED INDENTATION ON INTERCALATED CLAY REINFORCED POLYPROPYLENE NANOCOMPOSITES

机译：插层粘土增强聚丙烯纳米复合材料的仪表化压痕

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摘要

Instrumented indentation techniques were employed to investigate the local stiffness in comparison to the global stiffness in organomodified clay filled maleated polypropylene (MAPP). The morphology of composites was observed under transmission electron microscopy. Both highly intercalated and well exfoliated clay structures were observed in clay filled MAPP system. As a result, the region where indentation load was applied could be considered as the local composite system. Instrumented indentation was performed on three distinct positions: (a) clay intercalated and congregated region supported by MAPP matrix; (b) aggregate-MAPP boundary; and ? the MAPP alone. The clay aggregated region generally showed higher stiffness as compared to the MAPP matrix. And, the relative increase in indentation stiffness is substantially higher than the relative increase in tensile and compressive stiffnesses. Good linear correlation obtained between the changes in global and local indentation stiffness suggests plausible future application of nanoindentation technique in predicting the mechanical properties of the composite bulk. Furthermore, the highly intercalated morphology clearly provides a local and highly confined nanocomposite system similar to natural materials with optimum stiffening potential.
机译：与有机改性粘土填充的马来酸化聚丙烯（MAPP）的整体刚度相比，采用仪器压痕技术来研究局部刚度。在透射电子显微镜下观察到复合材料的形态。在粘土填充的MAPP系统中都观察到了高度插层和剥离良好的粘土结构。结果，可以将施加压痕载荷的区域视为局部复合系统。仪器压痕在三个不同的位置进行：（a）由MAPP基质支撑的粘土插层和聚集区域； （b）骨-MAPP边界；和？仅MAPP。与MAPP基质相比，粘土聚集区通常显示出更高的刚度。并且，压痕刚度的相对增加远高于拉伸和压缩刚度的相对增加。在整体压痕刚度和局部压痕刚度的变化之间获得良好的线性相关性，表明纳米压痕技术在预测复合材料块体的机械性能方面的合理应用前景。此外，高度嵌入的形态显然提供了类似于天然材料的局部且高度受限的纳米复合材料系统，具有最佳的增强潜力。

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