Bisphenol-A epoxy resin with excellent breakdown strength and competitive glass transition temperature

被引：3
作者：
Li, Mingru [1 ]
Zhou, Bin [1 ]
Shang, Kai [1 ]
Niu, Huan [1 ]
Zhao, Jiuhui [1 ]
Jiang, Liuhao [1 ]
Li, Jiacai [1 ]
Feng, Yang [1 ]
Li, Shengtao [1 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Shaanxi, Peoples R China
来源：
CHEMICAL ENGINEERING SCIENCE | 2025年 / 304卷
关键词：
Epoxy resin; DC dielectric strength; Glass transition temperature; Molecule design; Crosslinked structure; COMPOSITES; DIELECTRICS;
D O I：
10.1016/j.ces.2024.120979
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
In this research, we optimized both the molecular and crosslinked structures of epoxy resin to achieve exceptional breakdown strength and a competitive glass transition temperature (Tg). Through simulations, we found that the epoxy molecule with a polymerization degree of 0 (Ep0) exhibited a wider bandgap (Eg) and developed a dense crosslinked structure with higher density after crosslinking. This countered the negative impact of a reduced benzene structure, enhancing molecular rigidity and improving Tg. We isolated Ep0 components and prepared samples demonstrating a significant 22.18 % increase in breakdown strength (366.39 kV/mm vs. 299.87 kV/mm for commercial EP) and a Tg of 140.91 degrees C. The superior insulation properties of our product stem from its higher Eg molecular structure, while the competitive Tg is attributed to its compact crosslinked structure and increased density.
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页数：7
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