TY  - JOUR
AU  - Yuan, Hao
AU  - Hu, Shixun
AU  - Zhou, Yao
AU  - Yuan, Chao
AU  - Song, Wenbo
AU  - Shao, Qing
AU  - Shi, Hongwei
AU  - Li, Juan
AU  - Hu, Jun
AU  - Li, Qi
AU  - He, Jinliang
PY  - 2024
TI  - Enhanced Electrical Properties of Styrene-grafted Polypropylene Insulation for Bulk Power Transmission HVDC Cables
JO  - CSEE Journal of Power and Energy Systems
SN  - 2096-0042
SP  - 361
EP  - 370
VL  - 10
IS  - 1
AB  - Polypropylene (PP) is considered to be a rather promising material for HVDC cable insulation. Grafting modification has proved to be an effective method on the electrical property improvements of PP. This paper reports on the highly-enhanced electrical properties of styrene-grafted polypropylene (PP-g-St) and their related mechanism. The influence of grafting styrene on crystallization structures, thermal properties and electrical properties of PP-g-St are characterized and analyzed. These results show that PP-g-St exhibits remarkably enhanced DC volume resistivity, suppressed space charge accumulation and improved DC breakdown strengths as compared to PP. Crystallization observation shows PP-g-St has small, imperfect spherulites with indistinct boundaries, which is strongly correlated to enhanced electrical properties. This study provides an effective grafting strategy to design high-performance HVDC cable insulation materials for bulk power transmission systems.
UR  - https://doi.org/10.17775/CSEEJPES.2021.00850
DO  - 10.17775/CSEEJPES.2021.00850