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首页> 外文期刊>Journal of Applied Polymer Science >Surface-modified MgO nanoparticle enhances the mechanical and direct-current electrical characteristics of polypropylene/polyolefin elastomer nanodielectrics
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Surface-modified MgO nanoparticle enhances the mechanical and direct-current electrical characteristics of polypropylene/polyolefin elastomer nanodielectrics

机译：表面改性的MgO纳米颗粒增强了聚丙烯/聚烯烃弹性体纳米电介质的机械和直流电特性

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摘要

Polypropylene (PP)/polyolefin elastomer (POE) blends and MgO/PP/POE nanocomposites were fabricated by melt blending. The morphology, mechanical, and electrical properties of the nanocomposites were investigated. Scanning electron microscopy showed that the surface-modified MgO nanoparticles were well dispersed in the polymer matrix at low loadings of less than 3 phr. X-ray diffraction demonstrated that the crystalline phases of PP in the composites were changed and that the phase significantly increased. An examination of the electrical properties revealed that the direct-current (dc) electric breakdown strength and space-charge suppression effect were remarkably improved by the introduction of the surface-modified MgO nanoparticles. In addition, obvious enhancements in the tensile modulus and strength were obtained as a result of the synergistic toughening of the POE and MgO nanoparticles. Thus, MgO/PP/POE nanocomposites with enhanced mechanical and electrical properties have great potential to be used as recyclable insulation materials for high-voltage dc cables with large transmission capacities and high operating temperatures. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 132, 42863.
机译：通过熔融共混制备聚丙烯（PP）/聚烯烃弹性体（POE）共混物和MgO / PP / POE纳米复合材料。研究了纳米复合材料的形态，力学和电学性质。扫描电子显微镜显示，表面改性的MgO纳米粒子在小于3 phr的低负荷下很好地分散在聚合物基质中。 X射线衍射表明，复合材料中PP的结晶相发生了变化，并且该相显着增加。电学性能的研究表明，通过引入表面改性的MgO纳米粒子，直流（dc）电击穿强度和空间电荷抑制效果得到了显着改善。另外，由于POE和MgO纳米颗粒的协同增韧，获得了拉伸模量和强度的明显提高。因此，具有增强的机械和电性能的MgO / PP / POE纳米复合材料具有很大的潜力，可以用作具有大传输容量和高工作温度的高压直流电缆的可回收绝缘材料。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2016，132，42863。

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