环氧化物对双酚A环氧树脂固化后分子链弛豫的影响

2021 International Conference on Electrical Materials and Power Equipment (ICEMPE) Pub Date : 2021-04-11 DOI:10.1109/ICEMPE51623.2021.9509079

Mingru Li, Zhuoli Cai, Huan Niu, Shengtao Li, Yafang Gao, Bingnan Li, Hangyin Mao, Weiwang Wang, K. Shang

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引用次数: 0

摘要

环氧树脂在电力设备中广泛用作绝缘材料;然而，这些性能受介电弛豫的影响很大。本文采用三种含不同环氧化物的E51双酚A环氧树脂制作样品，分别进行差示扫描量热实验、傅里叶变换红外光谱测试和宽带介电光谱实验，研究环氧化物对分子链弛豫的影响。结果表明，当温度超过玻璃化转变温度($T_{g}$)时，分子链的弛豫决定了高频处的复介电常数。通过拟合复介电常数，发现环氧树脂的分子链弛豫为偶极弛豫极化。环氧化物含量高的环氧树脂具有更强的极化强度。

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The Effect of Epoxide on Molecular Chain Relaxation on Bisphenol A Epoxy Resin after Curing

Epoxy resin is widely used as insulating materials in the electric power equipment; however, these properties are affected by the dielectric relaxation greatly. In this paper, three kinds of E51 bisphenol A epoxy resin with different epoxides were used to make samples for differential scanning calorimetry experiment, fourier transform infrared spectroscopy test and broadband dielectric spectroscopy experiment to research the effect of epoxide on molecular chain relaxation. The results demonstrate the relaxation of molecular chain determines the complex permittivity at high frequency when the temperature is over glass transition temperature ($T_{g}$). Through fitting the complex permittivity, it is found the molecular chain relaxation of epoxy is dipole relaxation polarization. Epoxy resin with higher epoxide has stronger polarization intensity.

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2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)

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