METHOD OF MAKING POLY(ARYL ETHER KETONES) FROM 4,4' DIFLUOROBENZOPHENONE COMPRISING OXIDIZING SPECIES AND/OR NITRO COMPOUNDS

摘要

The application relates to methods for preparing Poly(Aryl Ether Ketones)(PAEK) and Poly (Ether Ether Ketones) (PEEK), using as a co- monomer 4,4'-difluorobenzophenone (4,4'-DFBP) that comprises small quantities of oxidizing species as impurities, such as for example nitro compounds. Certain methods for supplying 4,4'-DFBP comprising small concentrations of oxidizing impurities to poly(aryl ether ketone) manufacturers are also described. Also described are the resulting PAEK and PEEK polymers and analytical methods for measuring the concentration of the impurity oxidizing species in the 4,4'-difluorobenzophenone.