Crystallization of poly(aryl ether ketones). 2. Double peak melting behavior of PEEKK

Abstract

Abstract Annealing poly(ether ether ketone ketone) (PEEKK) between glass transition and melting temperature generally results in a pronounced double peak melting behavior as obtained by DSC. Detailed investigations of the dependence of this double peak melting behavior on annealing conditions and experimental parameters clearly reveal that the crystallization can be described by a two‐stage process occurring on different time scales. A recrystallization model as origin for the double peak melting curves can be disproved.