Crystallization Regulation of Cross-Linking Polypropylene on Dielectric Performance for Capacitors in SMES

IF 1.7 3区物理与天体物理 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Applied Superconductivity Pub Date : 2024-10-14 DOI:10.1109/TASC.2024.3479796

Meng Xiao;Yuyan Chen;B. X. Du;Sihua Liu;Li Wan

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Abstract

In this paper, a method based on irradiation cross-linking modification and crystallization regulation is proposed to improve the dielectric properties of polypropylene (PP) films. Sorbitol nucleating agent DMDBS with different contents is added during the preparation of cross-linked PP film to investigate the influence of nucleating agents on cross-linking modification. The results show that the cross-linked structure restricts the carrier migration behavior under the electric field, leading to a decrease in the conductivity. The doping of nucleating agents increased the nucleation density and the cross-linking degree of the PP films, thus further improving their insulating properties. The cross-linking degree of PP film doped with 0.05 wt% DMDBS is increased to 20.16%. The conductivity was decreased by 36.8%, and the breakdown strength was improved by 18.3% in contrast to pure PP film. The paper provides practical experience for the enhancement of insulating properties of PP films for capacitors.

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交联聚丙烯的结晶调节对 SMES 电容器介电性能的影响

本文提出了一种基于辐照交联改性和结晶调节的方法来改善聚丙烯（PP）薄膜的介电性能。在制备交联 PP 薄膜的过程中加入不同含量的山梨醇成核剂 DMDBS，研究成核剂对交联改性的影响。结果表明，交联结构限制了载流子在电场下的迁移行为，导致电导率下降。成核剂的掺入提高了 PP 薄膜的成核密度和交联度，从而进一步改善了其绝缘性能。掺杂了 0.05 wt% DMDBS 的 PP 薄膜的交联度提高到了 20.16%。与纯 PP 薄膜相比，导电率降低了 36.8%，击穿强度提高了 18.3%。本文为提高电容器用 PP 薄膜的绝缘性能提供了实践经验。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Applied Superconductivity 工程技术-工程：电子与电气

CiteScore

3.50

自引率

33.30%

发文量

650

审稿时长

2.3 months

期刊介绍： IEEE Transactions on Applied Superconductivity (TAS) contains articles on the applications of superconductivity and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Large scale applications include magnets for power applications such as motors and generators, for magnetic resonance, for accelerators, and cable applications such as power transmission.