环氧树脂的水老化:热氧化的影响

Nawfel Tahraoui, Romain Delannoy, Isabelle Derue, Emmanuel Richaud
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引用次数: 0

摘要

用三乙烯四胺固化双酚A二缩水甘油酯得到的环氧树脂样品在空气下160℃热氧化。通过动态水蒸气吸附法记录的吸水率和重量法研究了对吸水率的影响。实验数据主要表明环氧树脂中的水溶性由于氧化降解而增加,同时簇的形成仍然有限。在研究的老化条件下,水的扩散遵循菲克定律。尽管存在显著的链裂过程,但聚合物中的水扩散率保持不变,这可能与羟丙醚是水扩散的驱动力这一事实一致,并且在热老化过程中不会降解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Water Ageing of Epoxies: Effect of Thermal Oxidation

Water Ageing of Epoxies: Effect of Thermal Oxidation

Epoxy samples obtained by curing bisphenol A diglycidyl ether with triethylenetetramine are thermally oxidized at 160°C under air. The impact on water sorption is investigated by water uptake recorded by Dynamic Vapor Sorption and the gravimetric method. Experimental data mainly showed that water solubility in epoxies increases due to oxidative degradation, meanwhile, the formation of clustering remains limited. In the investigated ageing conditions, water diffusion obeys Fick's law. Despite a significant chain scission process, water diffusivity in polymer remains constant, possibly in line with the fact that hydroxypropylethers are the driving force of water diffusion and are not degraded during thermal ageing.

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