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Perylene‐containing copolyimides have been synthesized by one‐step polycondensation reaction under high temperature of two different aromatic diamines with a mixture of perylene‐3,4,9,10‐tetracarboxylic dianhydride (PTCDA) and 4,4'‐hexafluoroisopropylidene diphthalic anhydride (6FDA). The copolyimides were soluble in polar amidic solvents and their solutions gave flexible thin films when spread onto...
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