中国塑料2026，Vol.40Issue(6)：51-58,8.DOI:10.19491/j.issn.1001-9278.2026.06.009
聚丙烯高压电缆半导电屏蔽料增韧改性研究
Toughening modification of semi-conductive shielding materials for polypropylene high-voltage cables
摘要
Abstract
In this work,a semi-conductive shielding material for polypropylene(PP)high-voltage cables was prepared,with PP as the matrix resin,conductive carbon black(CB)as the conductive filler,and ethylene-propylene random copo-lymer(EPR)as the toughening elastomer,which is well-known for its excellent interfacial compatibility with PP.The effects of CB and EPR contents on the microstructure,crystallization behavior,mechanical properties,and electrical properties of the shielding material were comprehensively investigated.The results indicated that when the CB content is 27 wt%,the volume resistivity of the shielding material reaches 4.8 Ω·cm at 23℃and 11.9 Ω·cm at 90℃,indicating the formation of a stable conductive network.With the addition of 30 wt%EPR,the shielding material exhibits a tensile strength of 12.1 MPa and an elongation at break as high as 804.1%.Meanwhile,the flexural modulus and hardness de-crease to 250.8 MPa and 44.3,respectively,and the impact strength is increased by 44%compared with that of the shielding material without EPR.The EPR elastomer forms a uniformly distributed microstructure in the PP matrix,and the good interfacial compatibility between EPR and PP facilitates the uniform dispersion of CB in the EPR/PP biphasic matrix,thus maintaining an effective continuous conductive network.This research provides key data support for the de-velopment of high-performance semi-conductive shielding materials for PP high-voltage cables,laying a theoretical and experimental foundation for their practical engineering application.关键词
高压电缆/半导电屏蔽料/聚丙烯/弹性体/微观形貌Key words
high-voltage cable/semi-conductive shielding material/polypropylene/elastomer/microstructure分类
化学化工引用本文复制引用
展云鹏,侯帅,傅明利,廖雁群,林敏洪..聚丙烯高压电缆半导电屏蔽料增韧改性研究[J].中国塑料,2026,40(6):51-58,8.基金项目
南方电网公司科技项目(ZBKJXM20220101) （ZBKJXM20220101）
