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

IF 4.1 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science Pub Date : 2024-11-26 DOI:10.1016/j.ces.2024.120979

Mingru Li, Bin Zhou, Kai Shang, Huan Niu, Jiuhui Zhao, Liuhao Jiang, Jiacai Li, Yang Feng, Shengtao Li

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Abstract

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 (T_g). Through simulations, we found that the epoxy molecule with a polymerization degree of 0 (Ep₀) exhibited a wider bandgap (E_g) 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 T_g. 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 T_g of 140.91 °C. The superior insulation properties of our product stem from its higher E_g molecular structure, while the competitive T_g is attributed to its compact crosslinked structure and increased density.

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双酚 A 环氧树脂具有优异的击穿强度和极具竞争力的玻璃化转变温度

在这项研究中，我们对环氧树脂的分子结构和交联结构进行了优化，以获得优异的击穿强度和具有竞争力的玻璃化转变温度（Tg）。通过模拟，我们发现聚合度为 0（Ep0）的环氧分子具有更宽的带隙（Eg），并在交联后形成密度更高的致密交联结构。这抵消了苯结构缩减带来的负面影响，增强了分子刚性并提高了 Tg。我们分离出了 Ep0 成分，制备的样品击穿强度显著提高了 22.18%（366.39 kV/mm，而商用 EP 为 299.87 kV/mm），Tg 为 140.91 °C。我们产品优异的绝缘性能源于其更高的 Eg 分子结构，而具有竞争力的 Tg 则归功于其紧凑的交联结构和更高的密度。

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

Chemical Engineering Science 工程技术-工程：化工

CiteScore

7.50

自引率

8.50%

发文量

1025

审稿时长

50 days

期刊介绍： Chemical engineering enables the transformation of natural resources and energy into useful products for society. It draws on and applies natural sciences, mathematics and economics, and has developed fundamental engineering science that underpins the discipline. Chemical Engineering Science (CES) has been publishing papers on the fundamentals of chemical engineering since 1951. CES is the platform where the most significant advances in the discipline have ever since been published. Chemical Engineering Science has accompanied and sustained chemical engineering through its development into the vibrant and broad scientific discipline it is today.