Ionic liquids act as green solvents, which can replace the usual traditional solvents which pose both environmental and biological hazard. In the present work 4,4'diamino azobenzene has been condensed with various aliphatic diacids such as succinic acid, glutaric acid, adipic acid, azelaic acid, sebacic acid and Pimelic acid using imidazolium based ionic liquids in the presence of triphenylphosphite(TPP). The resulting azopolyamides have been obtained in high yield with intrinsic viscosity ranging from 0.56 - 0.81 dlg-1. This method is compared with modified Higashi’s method. The thermodynamic parameters like G, H and S are calculated by approximate methods such as Freeman & Carroll, Coats & Red fern, Doyle and Murray and White. The resulting polyamides prepared using green condition show increased thermal stability when compared to polyamides prepared by modified Higashi’s method.

中文翻译：

---

离子液体介导的4, 4'二氨基偶氮苯取代脂肪族聚酰胺的合成及热研究

离子液体作为绿色溶剂，可以替代通常对环境和生物有害的传统溶剂。在目前的工作中，4,4'二氨基偶氮苯已与各种脂肪族二酸缩合，如琥珀酸、戊二酸、己二酸、壬二酸、癸二酸和庚二酸，在亚磷酸三苯酯 (TPP) 存在下使用咪唑基离子液体。所得偶氮聚酰胺的产率高，特性粘度范围为 0.56 - 0.81 dlg-1。将该方法与修改后的 Higashi 方法进行了比较。G、H、S等热力学参数采用Freeman & Carroll、Coats & Red fern、Doyle and Murray and White等近似方法计算。