Abstract

Aromatic polyamidines based on 4,4′-diphenylmethane diisocyanate and bisamides have been synthesized and studied. The one-step reaction of bisamides with diazocyanate according to the [2+2]-cycloaddition mechanism includes a concerted process of the formation of two new σ-bonds in the transition state. The formation of polyamidine occurs as a result of decarboxylation, which completes this reaction. Due to the availability of starting compounds, ease of synthesis, good solubility, and high heat resistance and thermal stability of the resulting polymers, there are wide opportunities for producing new materials by conventional industrial processes. Polyamidines have a sufficiently large set of important technological properties, which suggest their greater potential in relation to applied problems. The resulting film materials and glass-reinforced plastics based on polyamidines show high mechanical properties that are not inferior to those of materials made from commercial polyamides and polybenzimidazoles.

中文翻译：

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[2+2]-环加成反应合成芳香族聚脒

摘要

合成并研究了基于4,4'-二苯基甲烷二异氰酸酯和双酰胺的芳香族聚脒。双酰胺与重氮氰酸酯根据[2+2]-环加成机理的一步反应包括在过渡态形成两个新σ键的协同过程。脱羧作用形成聚脒，从而完成该反应。由于所得聚合物起始化合物容易获得、合成容易、溶解性好、耐热性和热稳定性高，因此通过传统工业工艺生产新材料有广泛的机会。聚脒具有足够多的重要技术特性，这表明它们在解决应用问题方面具有更大的潜力。