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Title
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Synthesis and Characterization of Organosoluble Poly(imide-ether)s with Bulky 2,3-Diaryl Imidazole Moiety: Study Physical, Thermal and Optical Properties
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Type
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JournalPaper
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Keywords
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Poly(imide-ether), imidazole, thermal properties, solubility, fluorescent
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Abstract
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Two new symmetrical diamines were designed and synthesized having different functional groups such as a pair of phenyl ether linkages, 2,3-diaryl substituted imidazole rings and CF3 groups as pendant, and characterized by FT-IR, 1Hand 13C-NMR spectroscopy and elemental analysis. A series of new fluorescent poly(imide-ether)s (PIEs) was prepared by polymerization of the diamines with commercial tetracarboxylic dianhydrides such as pyromellitic dianhydride and 3,3,4,4-benzophenone tetracarboxylic dianhydride. The resulting PIEs were amorphous and had intrinsic viscosity [η] in the range of 0.42–0.51 dL/g. The weight average molecular weights (Mw) of these polymers were measured by GPC and were in the range of 28658–35595 g/mol with molecular weight distribution (MWD) of 2.12–2.27. These polymers were readily soluble in a variety of organic solvents and formed low-colored and flexible thin films with cut-off wavelength (λ0) in the range of 385–420 nm, and all PIEs films exhibited high optical transparency. They also possessed good thermal stability with 10% weight loss temperatures (T10%) in the range 486–537◦C in N2. The glass transition temperatures (Tg) of PIEs are in the range 251–324◦C. These polymers showed fluorescence emission in film and in solution at 459–476 nm with the quantum yields in the range 4–12%.
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Researchers
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Mehdi Taghavi (Fourth Researcher), Seyed Mojtaba Amininasab (Third Researcher), Samaneh Sharifi (Second Researcher), Mousa Ghaemy (First Researcher)
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