Crystalline Modification and Property Improvement of Polypropylene-based Composites

CHI Xiaohong; CHEN Lu; LIU Wenfeng; MIN Daomin; ZHANG Xiaohong; LI Shengtao

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Crystalline Modification and Property Improvement of Polypropylene-based Composites

更新时间：2025-12-08

- Crystalline Modification and Property Improvement of Polypropylene-based Composites
- Vol. 45, Issue 7, Pages: 2249-2256(2019)
- 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
  2. 哈尔滨理工大学工程电介质及其应用教育部重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：30 July 2019，
  
  Published：2019
- 稿件说明：
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CHI Xiaohong, CHEN Lu, LIU Wenfeng, et al. Crystalline Modification and Property Improvement of Polypropylene-based Composites[J]. 2019, 45(7): 2249-2256.
DOI：

CHI Xiaohong, CHEN Lu, LIU Wenfeng, et al. Crystalline Modification and Property Improvement of Polypropylene-based Composites[J]. 2019, 45(7): 2249-2256. DOI：

摘要

聚丙烯（PP）由于具有优异的介电性能和耐热性

而成为热塑性高压直流电缆绝缘材料研发关注的热点。为此利用纳米SiO

粒子填充协同聚烯烃类弹性体（POE）共混的方法

调控PP的结晶结构

改善其电、热、机械等宏观性能。利用扫描电子显微镜（SEM）、偏光显微镜（PLM）、交/直流击穿系统、电–声脉冲测试系统（PEA）、差示扫描量热仪（DSC）和电子万能实验机分别对复合材料的形貌、击穿场强、空间电荷分布、结晶行为和力学性能进行了分析和表征

结果表明纳米SiO

粒子填充协同POE共混有效提高了PP的直流击穿场强

抑制空间电荷注入

改善其机械性能。相较于纯PP试样

PP–POE–纳米SiO

构成的复合材料

击穿场强提高约25%

断裂伸长率提高约30%。机械与介电性能的改善

有利于PP在高压直流电缆绝缘中的应用。

Abstract

Due to the superior thermal and dielectric properties of polypropylene（PP）

PP becomes a suitable candidate for thermoplastic insulator of high-voltage direct-current（HVDC） cable. In this paper

both nano-SiO

and polyethylene octene（POE） were introduced in PP matrix

in order to modify the crystalline and improve the electrical and mechanical properties. The morphology

DC breakdown strength

space charge distribution

crystallization behavior and mechanical properties were characterized by scanning electron microscopy（SEM）

polarized light microscopy（PLM）

AC/DC breakdown system

pulsed electro-acoustic system（PEA）

differential scanning calorimeter（DSC）

and electronic universal testing. The results showed that the DC breakdown field was enhanced

the space charge was inhibite

d and the mechanical properties were improved in the composite with the co-doping of nanoparticles filling and POE blending. The breakdown strength increased by about 25% and the elongation at break increased by about 30% in the composite compound of PP

POE and nano-SiO

compared with raw PP sample. The modification of mechanical and dielectric properties provides promising results for the application of PP in HVDC cables.

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