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Various proportions of 4,4′-oxybisbenzoic acid (OBBA) were incorporated to obtain the spinning solution of sulfonated polyoxadiazole (SPOD) copolymer through copolymerization in oleum. And the sulfonated fibers were prepared from the solution by using wet spinning approaches. The chemical structures of the fibers were characterized using Fourier transform infrared spectroscopy (FTIR) and elemental...
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