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    Synthesis and thermal properties of polyamide 6 (A)-polyimide (B) block copolymers of ABA type

    Polyimides (PI) having different molecular weights were prepared by condensation of oxydiphthalic anhydride with 9,9-bis-(4-aminophenyl)fluorene in nitrobenzene solution at 180°C. These polyimides carried two ...

    F. J. Carrière, H. Sekiguchi, N. N. Surin, V. A. Kotelnikov… in Polymer Bulletin (1995)