Synthesis and study of sulfonated poly(ether-ketone)s

An aromatic poly(ether-ketone) was prepared by the reaction of 2,2-bis(4-hydroxyphenyl)-propane with 4,4'-difluorobenzophenone and it was further sulfonated using chlorosulfonic acid and trimethylchlorosilane in 1,2-dichloroethane solution. The resulting sulfonated polymers were characterized by elemental analyses, gel permeation chromatography, infrared and H-1-NMR spectroscopy, thermogravimetric analyses and differential scanning calorimetry. Some correlations between the conditions of sulfonation reaction and the properties of the resulting polymers were made