Space Charge and Conductance Characteristics of Polypropylene/Polyolefin Elastomer Composites

CAO Dan; LIANG Qilu; ZHAN Yunpeng; HOU Shuai; LIAO Yanqun; CAO Anying; HE Wei; WU Kai; LÜ Zepeng

doi:10.7652/xjtuxb202504006

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Space Charge and Conductance Characteristics of Polypropylene/Polyolefin Elastomer Composites

更新时间：2026-01-06

- Space Charge and Conductance Characteristics of Polypropylene/Polyolefin Elastomer Composites
- Journal of Xi’an Jiaotong University Vol. 59, Issue 4, Pages: 60-69(2025)
- 作者机构：
  
  1.西安交通大学电力设备电气绝缘国家重点实验室， 710049，西安
  2.南方电网科学研究院有限责任公司， 510080，广州
  3.广东电网有限责任公司珠海供电局， 519075，广东珠海
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202504006
  CLC： TM215
- Received：20 September 2024，
  
  Online First：10 December 2024，
  
  Published：10 April 2025
- 稿件说明：
移动端阅览
CAO Dan, LIANG Qilu, ZHAN Yunpeng, et al. Space Charge and Conductance Characteristics of Polypropylene/Polyolefin Elastomer Composites[J]. Journal of Xi’an Jiaotong University, 2025, 59(4): 60-69.
DOI：

CAO Dan, LIANG Qilu, ZHAN Yunpeng, et al. Space Charge and Conductance Characteristics of Polypropylene/Polyolefin Elastomer Composites[J]. Journal of Xi’an Jiaotong University, 2025, 59(4): 60-69. DOI： 10.7652/xjtuxb202504006.

摘要

针对聚丙烯（PP）经弹性体增韧后力学和电学性能发生变化，引入弹性体导致材料电学性能下降的问题，采用共混法在PP基体中添加不同质量分数的聚烯烃弹性体（POE）。结合复合材料力学及绝缘性能研究，提出力-电综合性能最优的POE配比，又进一步结合复合材料微观形貌、热转变特征及绝缘性能，分析高温下PP/POE复合材料的空间电荷积聚和电荷输运特性。研究发现，随着POE含量的增加，PP/POE复合材料的弹性模量降低，直流击穿场强随POE含量的增加下降，高电场下

POE

为40%复合材料的电导率是所有复合材料中最低的，约为PP电导率的3倍，其他复合材料电导率比PP大一个数量级，20 ℃下，

POE

分别为50%、60%复合材料的异极性电荷积累量较大。高温下，PP和

POE

为40%复合材料直流击穿场强随温度升高下降，PP空间电荷性能较稳定，

POE

为40%复合材料空间电荷积聚量随温度升高增加，尤其在60 ℃以上，内部空间电荷量剧增。研究揭示了PP/POE复合材料在高温下的空间电荷积聚和电导剧增，这是限制其绝缘性能的关键问题。

Abstract

In response to the changes in mechanical and electrical properties of polypropylene (PP) after toughening with an elastomer

which leads to a decrease in material's electrical performance due to the introduction of the elastomer

a blend method is employed to add different mass fractions of polyolefin elastomer (POE) into the PP matrix. Firstly

considering research on mechanical and insulation properties of composite materials

the optimal POE ratio for the best overall mechanical-electrical performance is proposed. Furthermore

the space charge accumulation and charge transport characteristics of PP/POE composites at high temperature are analyzed based on the microstructure

thermal transition characteristics and insulation properties of the composites. The r

esearch shows that with an increase in POE content

the elastic modulus of PP/POE composites decrease

and the direct current breakdown strength decreases with increasing POE content. Under high electric fields

the electrical conductivity of the composite with

POE

=40% is the lowest among all composites

approximately three times that of PP conductivity. Other composites exhibit electrical conductivities one order of magnitude higher than PP. At 20 ℃

composites with

POE

=50%

60% respectively show significant anisotropic charge accumulation. At high temperatures

the DC breakdown strength of PP and the composite with

POE

=40% decreases with increasing temperature. The spatial charge performance of PP is relatively stable

while the spatial charge accumulation in the composite with

POE

=40% increases with temperature

especially above 60 ℃

leading to a significant increase in internal space charge. This research reveals that the accumulation of space charge and the dramatic increase in electrical conductivity of PP/POE composites at high temperatures are key issues limiting their insulation performance.

关键词

Keywords

references

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