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Relationship between the dielectric and mechanical properties and the ratio of epoxy resin to hardener of the hybrid thermosetting polymers

机译:杂化热固性聚合物的介电和力学性能与环氧树脂与固化剂的比例之间的关系

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摘要

The relationship between the dielectric properties (dielectric constant, ε′, and loss factor, ε; activation energy, E a) and the ratio of epoxy resin (OG) to hardener of the epoxy resin thermosetting polymers was investigated. The amplitude of the ε″ peak decreases with increasing OG content until about 73 wt.% and slightly increases at higher OG content. The temperature of the position of the ε″ peak increases with the increasing of OG content, reaching maximum values for compositions in the range of 67 and 73 wt.%, and then it decreases sharply at higher OG content. The activation energy obtained from dielectric relaxation increased with increasing wt.% OG up to around 70 wt.%. Further increase in concentration of OG up to 83 wt.% reduced E a. The curves of tensile modulus and fracture toughness mechanical properties as a function of OG content presented a similar behavior. ©2006 Sociedade Brasileira de Química.
机译:研究了介电性能(介电常数ε'和损耗因子ε;活化能E a)与环氧树脂(OG)与环氧树脂热固性聚合物的硬化剂之间的关系。 ε”峰的幅度随着OG含量的增加而降低,直至达到约73 wt。%,在OG含量较高时略有增加。随着OG含量的增加,ε''峰的位置温度升高,在67至73 wt。%的范围内达到最大值,然后在OG含量较高时急剧下降。通过介电弛豫获得的活化能随OG的重量百分比增加到大约70重量%而增加。 OG的浓度进一步增加至83 wt。%会降低E a。拉伸模量和断裂韧性机械性能随OG含量的变化曲线表现出相似的行为。 ©2006巴西巴西利亚社会学院。

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