Abstract
Poly(N-arylenebenzimidazole ketone ketone)s (PNABIKKs) consisting of m- and p-phenylene linkages have been synthesized by nucleophilic aromatic substitution from bis(benzimidazolyl) derivatives containing sulfonyl, carbonyl, and ether groups with activated aromatic difluorides in sulfolane at 210 °C in the presence of anhydrous potassium carbonate. The structures of the polymers were characterized by means of Fourier tramsfom infrared (FTIR), proton nuclear magnetic resonance (1H NMR) spectroscopy, and elemental analysis, and the results were largely consistent with the proposed structure. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TG) measurements demonstrated that polymers had high glass transition temperatures (T g >220 °C) and good thermal stability with high decomposition temperatures (T D >480 °C). These novel polymers also showed good solubility.
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Xu, Y., Tang, J., Chang, G. et al. Synthesis and characterization of poly(N-arylenebenzimidazole ketone ketone)s. Macromol. Res. 21, 681–686 (2013). https://doi.org/10.1007/s13233-013-1059-9
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DOI: https://doi.org/10.1007/s13233-013-1059-9