Abstract

The synthesis is considered of epoxyurethane interpenetrating polymer networks with preliminary preparation of polyurethane chains in epoxy resin. Amine hardeners of aromatic and aliphatic nature were selected as crosslinking agents for epoxy resin. The cure kinetics of epoxyurethane systems was studied using non-isothermal differential scanning calorimetry. The total activation energy was calculated using the methods of Ozawa and Kissinger. The application of Starink’s isoconversion method made it possible to find the dependence of the activation energy values on the conversion. Further analysis of the reaction kinetics using Malek method showed the autocatalytic nature of the reaction. The chosen two-parameter Šesták–Berggren model is well suited for describing the cure kinetics of the studied epoxyurethane compositions.

中文翻译：

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含各种性质胺固化剂的环氧聚氨酯组合物的固化动力学

摘要

初步合成了环氧树脂中的聚氨酯链，考虑了环氧乙烷互穿聚合物网络的合成。选择具有芳香族和脂肪族性质的胺硬化剂作为环氧树脂的交联剂。使用非等温差示扫描量热法研究了环氧聚氨酯体系的固化动力学。使用小泽和基辛格的方法计算总活化能。Starink等值转换方法的应用使得可以找到活化能值对转换的依赖性。使用Malek方法对反应动力学的进一步分析显示了反应的自催化性质。选择的两参数Šesták-Berggren模型非常适合描述所研究的环氧聚氨酯组合物的固化动力学。