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New Poly(aryl ether ketone) Copolymers Containing 1,5‐Napthalene Rings

A new monomer 1,5‐bis(4‐(4′‐fluorobenzoyl) phenoxy) naphthalene(1,5‐BFPN) was synthesized with 4,4′‐difluorobenzophenone(DFB) and 1,5‐dihydroxynaphthalene(DHN), and the new monomer was characterized by X‐Ray single crystal diffraction. The polycondensation of 1,5‐BFPN with PEEK oligomer in diphenyl sulfone (DPS) in the presence of an excess of sodium carbonate and potassium carbonate as a condensation reagent was carried out at 320°C to quantitatively afford the corresponding poly(ether ether ketone‐co‐ether naphthalene ether ketone) regular copolymers. Thermal analysis of the copolymers showed that the glass transition temperature increased, while the melting temperature decreased with increasing the content of 1,5‐BFPN moieties.