Synthesis and Properties of a Novel Poly(aryl ether ketone)s Containing Halogen Groups

A novel bisphenol monomer 4-iodophenyl hydroquinone (I-Ph-HQ) was synthesized. Further, a series of poly(aryl ether ketone)s containing halogen groups in side chains(PEEK-CF3-I) was synthesized by nucleophilic substitution polycondensation reaction using the bisphenol monomer I-Ph-HQ and (3-trifluoromethyl) phenyl hydroquinone with 4,4'-difluorobenzophenone(DFB). The chemical structures of the copolymers were characterized by FTIR and H-1 NMR. Moreover, the dielectric properties, thermal properties and mechanical properties of the prepared copolymers PEEK-CF3-I were revealed. The effect of fluorine and iodine side groups in the copolymer was discussed. The results show that the glass transition temperature(T-g) of copolymer can be significantly enhanced with the increase of the content of iodine side groups in copolymers, especially for copolymer material PEEK-CF3-I-10% the T-g is 153 degrees C, meanwhile, the material exhibits excellent mechanical properties and low dielectric constant.