For the first time, film-forming aromatic acyclic polyimides were obtained as a result of in situ rearrangement or as a result of heat treatment of polycarboxyimidates by the Mumm-Hess mechanism. Intermediate polycarboxyimidates were prepared using the acid-catalyzed reaction of dicarboxylic acids and dinitriles in ionic liquids. The probable mechanism and the corresponding kinetic parameters of thermooxidative decomposition of acyclic polyimides were determined using NetzschThermokinetics 3 – multidimensional nonlinear regression software.

中文翻译：

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无环聚酰亚胺的合成及热氧化降解

作为原位重排的结果或通过Mumm-Hess机理对聚羧酸亚胺酯进行热处理的结果，首次获得了成膜的芳族无环聚酰亚胺。使用二羧酸和二腈在离子液体中的酸催化反应，可以制备中间体聚羧酰亚胺。使用NetzschThermokinetics 3 –多维非线性回归软件确定了无环聚酰亚胺热氧化分解的可能机理和相应的动力学参数。