Direct polycondensation in ionic liquids

Ionic liquids (ILs) are subject to an enormous research effort due to their unique properties, such as non-volatility, high solution and reactivity ability, etc. For the first time ILs have been used as a solvent for preparing polymers via direct polycondensation. The influence of IL's nature and reaction parameters upon the polymer formulation has been investigated. It is shown that direct polycondensation is successfully proceeded in ILs and triphenyl phosphite (condensing agent) without any additional extra components, such as LiCl and pyridine, using in similar reactions in ordinary molecular solvents. Various polyamides (η_inh=0.11-1.10 dl/g), polyamide imides (η_inh=0.48-1.41 dl/g), -hydrazides (η_inh=0.56-0.60 dl/g) and polyhydrazides (η_inh=0.71-1.32 dl/g) have been obtained in quantitative yield and high molecular weight.