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Title
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A QUICK AND GREEN IONIC LIQUID-MEDIATED APPROACH FOR THE SYNTHESIS OF HIGH-PERFORMANCE, ORGANOSOLUBLE AND THERMALLY STABLE POLYIMIDES
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Type
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JournalPaper
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Keywords
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Ionic liquids; Poly(ether-imide); Polycodensation; Green media; Thermal properties.
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Abstract
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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 °C and 10% weight loss temperature (T10) up to 570 °C in N2 and 528 °C in air.
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Researchers
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Seyed Mojtaba Amininasab (Fourth Researcher), Marjan Hassanzadeh (Third Researcher), Mousa Ghaemy (Second Researcher), Mehdi Taghavi (First Researcher)
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