Dielectric Properties of Thermally Aged Polypropylene Nanocomposites

IF 3.1 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2022-03-31 DOI:10.1109/TDEI.2022.3163796

A. Azmi;K. Y. Lau;N. A. Ahmad;Z. Abdul-Malek;C. W. Tan;K. Y. Ching;A. S. Vaughan

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引用次数: 2

Abstract

This article reports on an investigation into the effects of thermal aging on the structure and dielectric properties of polypropylene (PP) nanocomposites. Magnesium aluminate (MgAl ₂ O ₄ ), calcium carbonate (CaCO ₃ ), and surface-modified calcium carbonate (CaCO ₃ T) nanofillers have been added to PP and the resulting nanocomposites have been subjected to aging at 110 °C and 140 °C. The results show that unfilled PP experiences a 13% reduction in its dc breakdown strength after aging at 110 °C and that its dc breakdown strength reduces by 27% after aging at 140 °C. In contrast, the reduction in the dc breakdown strength of all investigated PP nanocomposites is much less pronounced than that of the unfilled PP after aging. Specifically, the dc breakdown strength of PP/MgAl ₂ O ₄ nanocomposites, PP/CaCO ₃ nanocomposites, and PP/CaCO ₃ T nanocomposites reduces by 8%, 14%, and 14%, respectively, after aging at 140 °C. Possible mechanisms affecting the dc breakdown strength of the unfilled PP and PP nanocomposites before and after aging are consequently discussed.

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热老化聚丙烯纳米复合材料的介电性能

研究了热老化对聚丙烯(PP)纳米复合材料结构和介电性能的影响。将铝酸镁(MgAl2O4)、碳酸钙(CaCO3)和表面改性碳酸钙(CaCO3T)纳米填料添加到PP中，并对所得纳米复合材料进行110℃和140℃的时效处理。结果表明，未填充PP在110℃时效后，其直流击穿强度降低13%，在140℃时效后，其直流击穿强度降低27%。相比之下，所有研究的PP纳米复合材料在老化后直流击穿强度的下降都远不如未填充的PP明显。具体来说，PP/MgAl2O4纳米复合材料、PP/CaCO3纳米复合材料和PP/CaCO3T纳米复合材料在140℃时效后，直流击穿强度分别下降了8%、14%和14%。讨论了老化前后影响未填充PP和PP纳米复合材料直流击穿强度的可能机理。

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来源期刊

IEEE Transactions on Dielectrics and Electrical Insulation 工程技术-工程：电子与电气

CiteScore

6.00

自引率

22.60%

发文量

309

审稿时长

5.2 months

期刊介绍： Topics that are concerned with dielectric phenomena and measurements, with development and characterization of gaseous, vacuum, liquid and solid electrical insulating materials and systems; and with utilization of these materials in circuits and systems under condition of use.