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• W2053247084 abstract "A new family of wholly aromatic poly(urea-ether-imide)s (4a–4f) possessing binaphthylene-twisted rings was prepared by diphenyl azidophosphate (DPAP)-activated one-pot polyaddition reaction of a preformed imide heterocyclic ring-containing dicarboxylic acid, 2,2′-bis(4-trimellitimidophenoxy)- 1,1′-binaphthyl (1) with various kinds of aromatic diamines (3a–3f). At first, with due attention to structural similarity and to compare the characterization data, a model compound 2 was synthesized by the reaction of diimide-dicarboxylic acid 1 with two mole equivalents of aniline. In this direct method, the polymers were prepared by polyaddition reactions of the in situ-formed diisocyanate with the aromatic diamines. Molecular weights of the poly(urea-ether-imide)s obtained were evaluated viscometrically, and the inherent viscosities (ηinh) measured were in the range 0.10– 0.25 dl/g. All of the polymers were characterized by FT-IR spectroscopic method and elemental analysis. All of the resulting polymers exhibited an excellent solubility in common polar solvents such as N-methyl-2-pyrrolidone (NMP), dimethyl sulfoxide (DMSO), N,N-dimethylformamide (DMF), and N,N-dimethylacetamide (DMAc). Crystallinity of the resulted polymers was evaluated by wide-angle X-ray diffraction (WXRD) method, and they exhibited nearly a non-crystalline nature as evidenced by their diffractograms. The glass transition temperatures (Tg) of the polymers determined by differential scanning calorimetry (DSC) thermograms were in the range of 274–302°C. The temperatures at 10% weight loss (Td10%) from their thermogravimetric analysis (TGA/DTG) curves were found to be in the range of 389–414°C in nitrogen atmosphere. Copyright © 2008 John Wiley & Sons, Ltd." @default.
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• W2053247084 date "2008-08-01" @default.
• W2053247084 modified "2023-10-09" @default.
• W2053247084 title "Thermally stable and organosoluble binaphthylene-based poly(urea-ether-imide)s: one-pot preparation and characterization" @default.
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• W2053247084 doi "https://doi.org/10.1002/pat.1072" @default.
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