Synthesis and properties of cardo poly(arylene ether ketones)

The effects of polycondensation conditions and the chemical structure of ca rdo bisphenols on the molecular mass of poly(arylene ether ketones) synthes ized by the reaction of 4,4'-difluorobenzophenone (4,4'-dichlorobenzophenon e) with phenolphthalein. phenolphthalein anilide, phenolfluorene, and pheno lanthrone were studied. The optimal conditions for the preparation of high- molecular-mass polymers were determined, and the possibility of controlling their molecular masses is shown (M-w = 1 x 10(4)-1 x 10(5) and above). The effects of molecular mass and chemical structure of polymers on their heat resistance, ultimate tensile strength, relaxation behavior, and rheologica l properties of the polymers were investigated. It is found that the polyme ric materials (both unfilled and filled with glass or carbon short fibers) exhibit an extremely high specific impact strength.