Synthesis and Properties of Novel Soluble Poly(Aryl Ether Ketone)s Containing Fluorine

Two types of novel poly (aryl ether ketone)s containing fluorine were synthesized by using bisphenol AF, 1,4bis (4fluorobenzoyl) benzene and 1,3-bis (4-fluorobenzoyl) benzene via nucleophilic substitution reaction, then the processing performance of the polymers was greatly improved. The synthesized polymers were analyzed and characterized by FT-IR, 1H-NMR, GPC, DSC and TGA. The thermal properties, solubility, tensile properties and dielectric properties were also studied. The results show that the polymers have high molecular weight（Mw>6.24×104）, and display good thermal properties with glass transition temperatures Tg of 174 ℃ and 162 ℃, good thermal stability with 5% mass loss at 525 ℃ and 507 ℃ in air，respectively. The polymers also show good solubility in some solvents such as NMP, DMAc, THF, and chloroform at room temperature. The tensile strengths of 98 MPa and 93 MPa when the polymers were casted into flexible and transparent films. The films showed lower dielectric constant of 2.85 and 2.94 at 1 MHz, respectively.