Three diamine monomers with different derivatives of imidazole heterocyclic ring and meta-linked aryl ethers were synthesized and used in polycodensation reaction with various commercial dianhydrides for preparation o...Three diamine monomers with different derivatives of imidazole heterocyclic ring and meta-linked aryl ethers were synthesized and used in polycodensation reaction with various commercial dianhydrides for preparation of a series of novel poly（ether-imide） （PEI）s. The polycodensation reactions were carried out by using conventional method and in a green medium of ionic liquid （IL） without using NMP-pyridine-acetic anhydride. The PEIs were obtained in good yields （80%-96%） with moderate viscosity （0.48-0.66 dL/g） in a shorter reaction time （10 h） in IL as compared with the conventional method （36 h）. All of the polymers were amorphous in nature, showed excellent solubility in amide-type polar aprotic solvents with ability to form tough and flexible films, and excellent thermal stability with Tgs in the range of 212-340℃ and 10% weight loss temperature （T10） up to 570℃ in N2 and 528 ℃ in air.展开更多
文摘Three diamine monomers with different derivatives of imidazole heterocyclic ring and meta-linked aryl ethers were synthesized and used in polycodensation reaction with various commercial dianhydrides for preparation of a series of novel poly（ether-imide） （PEI）s. The polycodensation reactions were carried out by using conventional method and in a green medium of ionic liquid （IL） without using NMP-pyridine-acetic anhydride. The PEIs were obtained in good yields （80%-96%） with moderate viscosity （0.48-0.66 dL/g） in a shorter reaction time （10 h） in IL as compared with the conventional method （36 h）. All of the polymers were amorphous in nature, showed excellent solubility in amide-type polar aprotic solvents with ability to form tough and flexible films, and excellent thermal stability with Tgs in the range of 212-340℃ and 10% weight loss temperature （T10） up to 570℃ in N2 and 528 ℃ in air.
