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In this paper, the synthesis and crystallization behavior of poly(ether ether ketone ether ketone) (PEEKEK) arereported. PEEKEK was prepared from 4,4’-bis(p-fluorobenzoyl) diphenyl ether (4,4’-FBDE) and hydroquinone along thenucleophilic substitution route. The thermal properties were investigated by using DSC and TGA. The crystallizationbehavior of PEEKEK under several conditions, i.e., crystallization from the molten state (melt crystallization), crystallizationfrom a quenched sample (cold crystallization) and crystallization induced by exposing glassy sample to methylene chloride(solvent-induced crystallization) has also been investigated. The results show that crystallization of PEEKEK could beinduced by the above methods, and no polymorphism was found. The diflierences in the crystallization of PEEKEK inducedby the above methods are seen in their degree of crystallinity.
In this paper, the synthesis and crystallization behavior of poly (ether ether ketone ether ketone) (PEEKEK) arereported. PEEKEK was prepared from 4,4’-bis (p-fluorobenzoyl) diphenyl ether (4,4’-FBDE) The thermal properties were investigated by using DSC and TGA. The crystallization behavior of PEEKEK under several conditions, ie, crystallization from molten state (melt crystallization), crystallization from a quenched sample (cold crystallization) and crystallization induced by exposing glassy The results show that crystallization of PEEKEK could be induced by the above methods, and no polymorphism was found. The diflierences in the crystallization of PEEKEK induced by the above methods are seen in their degree of crystallinity.