Dielectric study of a cyclo-aliphatic UV-curable epoxy resin copolymerized with a low glass transition co-monomer bearing methylene units

2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2011-10-01 DOI:10.1109/CEIDP.2011.6232742

C. V. Bouanga, H. Couderc, G. Malucelli, M. Frechette, G. Camino, S. Savoie, J. Castellon, L. Banet

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引用次数: 5

Abstract

This work focuses on dielectric properties of a polymer constituted of epoxy resin and a very low glass transition temperature polymer. To this aim, a cycloaliphatic diepoxy monomer, namely 3, 4 - epoxycyclohexylmethyl-3', 4' - epoxy-cyclohexane carboxylate (CE), was copolymerized with 1,6-hexanediol diglycidyl ether (HDGE) by UV-curing employing different CE amounts (up to 40 wt. %). Two relaxation modes namely β and γ were observed, attributed to the local molecular motions. It has been shown that the dielectric constant and the thermal properties depend on the concentration of the CE. Their structural morphology and the effect of space charge were studied using the Thermal Step Method. The dielectric responses for UV-cured HDGE/CE systems are presented. The potential effect of moisture and/or ions, the effect of the formation of a polymer network having a tunable crosslinking density and the effect of space charge on the copolymers were also investigated. The influence of chain lengths on dielectric behaviour has also been investigated.

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含亚甲基低玻璃化过渡共聚物的环脂肪族紫外光固化环氧树脂的介电性能研究

本文主要研究了环氧树脂和极低玻璃化转变温度聚合物组成的聚合物的介电性能。为此，采用不同CE量(高达40 wt. %)的紫外光固化方法，将一种环脂肪族二氧基单体3,4 -环氧环己基甲基-3′，4′-环氧环己烷羧酸酯(CE)与1,6-己二醇二缩水甘油醚(HDGE)共聚。观察到两种弛豫模式，即β和γ，归因于局部分子运动。结果表明，介电常数和热性能与CE的浓度有关。用热步法研究了它们的结构形态和空间电荷的影响。介绍了紫外光固化HDGE/CE体系的介电响应。研究了水分和/或离子的潜在影响、形成具有可调交联密度的聚合物网络的影响以及空间电荷对共聚物的影响。还研究了链长对介电性能的影响。

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2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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