Synthesis and Characterization of Poly aryl ether ketone Copolymers with Pendent Group

5 Synthesis and Characterization of Poly (aryl ether ketone) Copolymers with Pendent Group 

Synthesis and characterization of poly(aryl ether ketone) with trifluoromethyl-substituted benzene in the side chain 

In recent years, considerable attention hcis been devoted to the preparation of fluorine-containing polymers due to their unique properties and high-temperature performance. The incorporation of fluorine atoms (or groups containing fluorine atoms) into polymer chains changes solubility of polymers, glass transition temperature (T ) and thermal stability, while also led to decreased moisture absorption and dielectric constant. The aromatic fluoropolymers have currently been used as films, coatings microelectronics devices [37,55-60]. 

A new monomer (4-(4 -trifluoromethyl)phenoxyphenyl)hydro-quinone (TFPOPH) was synthesized in a three-step synthesis. A series of poly (aryl ether ketone) copolymers were prepared by the reaction of (4-(4 -trifluoromethyl)phenoxyphenyl) hydroquinone and hydroquinone (HQ) with 4,4 -difluorobenzophenone (Dre) in the presence of potassium carbonate. A typical polymerization was carried out as follows To a three-neck round bottom flask were added hydroquinone and (4-(4 -trifluoromethyl)-phenox)q henyl) hydroquinone (TFPOPH) (total O.lOmol) in molar ratios of 100 0, 80 20, 60 40, 40 60, 20 80 and 0 100, 4,4 -difluorobenzophenone (DFB), toluene and 3.04 g (0.022 mol) of potassium carbonate and tetramethylene sulfone (TMS) (a prescribed amount shown in Table 10.5) and heated to 140°C to remove produced water by azeotropic distillation with toluene and then rose up to 210°C for 4-6 h. The copolymer was precipitated by pouring the hot reaction mixture into a large amount of distilled water, filtered, and washed 

The copolymers were characterized by D, TGA, X-ray and impedance gain-phase analyzer. The results and discussion was specified as follows  

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