Nonisothermal melt and cold crystallization kinetics of poly(aryl ether ketone ether ketone ketone)

Nonisothermal melt and cold crystallization kinetics of poly(aryl ether ket one ether ketone ketone) (PEKEKK) were investigated by differential scannin g calorimetry (DSC). The Avrami equation modified by Jeziorny could only de scribe the primary stage of nonisothermal crystallization kinetics of PEKEK K. Also, the Ozawa equation could not describe its nonisothermal crystalliz ation behavior. A convenient and reasonable kinetic approach was used to de scribe the nonisothermal crystallization behavior. The crystallization acti vation energy were estimated to be -264 and 370 KJ/mol for nonisothermal me lt and cold crystallization by the Kissinger method. (C) 2000 John Wiley & Sons, Inc.