Fig. 1.

Structure and performance of PAEK (PEKK and PEEK), and fabrication of PEKK. (A) Performance of PAEK; (B) Structures of PAEK; (C) Production of PEKK by electrophilic substitution using nitrobenzene and aluminum chloride (AlCl₃). PAEK = Polyaryletherketone, PEEK = Polyetheretherketone, PEKK = Polyetheretherketone, PPS = Polyphenylene sulfide, PAI = Polyamideimide, PES = Polyethersulfone, PEI = Polyethylenimine, POM = Polyoxymethylene, PC = Polycarbonates, PA = polyamide, PMMA = Polymethyl methacrylate.