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首页> 外文期刊>Journal of Applied Polymer Science >Polyethylene/silica nanorod composites with reduced dielectric constant and enhanced mechanical strength
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Polyethylene/silica nanorod composites with reduced dielectric constant and enhanced mechanical strength

机译：聚乙烯/二氧化硅纳米棒复合材料，具有降低的介电常数和增强的机械强度

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Reinforcement of materials with low dielectric constant by nanofillers has attained more and more attention. Conventional 1D nanofillers, such as carbon nanotubes, significantly enhance mechanical properties of polymers; however, they do not reduce dielectric constant. In this study, silica nanorods (SNR) were used to prepare polyethylene composites by mechanical blending followed by hot pressing. It was found that the incorporation of SNRs enables enhancement of strength and elastic modulus. Dielectric constant did not increase as predicted when SNRs were incorporated into polyethylene (PE); on contrary, it considerably decreased from similar to 2.4 to around similar to 2.2 at SNR loading of 5 wt %. However, when glass fibers were used as fillers, we did not observe such decrease. SEM image and density measurement indicated that the composites were compact with very low porosity. We believe that the incorporation of SNRs alters crystalline and chain arrangement of PE, thus reduces the polarization and dielectric constant. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47143.
机译：纳米填充物强化具有低介电常数的材料越来越受到越来越多的关注。常规的1D纳米氧化物，例如碳纳米管，显着增强了聚合物的机械性能;但是，它们不会降低介电常数。在该研究中，硅纳米棒（SNR）用于通过机械混合制备聚乙烯复合材料，然后通过热压制备聚乙烯复合材料。发现SNR的加入能够提高强度和弹性模量。当SNR掺入聚乙烯（PE）中时，介电常数不增加。相反，在SNR负载量为5wt％的SNR负载下，它显着降低了2.4至约2.2。然而，当使用玻璃纤维作为填料时，我们没有观察到这种减少。 SEM图像和密度测量表明复合材料具有非常低的孔隙率。我们认为，信噪比会改变PE的结晶和链排列的掺入，从而降低极化和介电常数。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,47143。

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