STUDIES ON ISOTHERMAL CRYSTALLIZATION KIN ETICS OF POLY(ETHER ETHER KETONE KETONE)

A study has been made for the crystallization behaviour of poly(ether ether ketone ketone) by DSC which was used to monitor the crystallizat ion process from the melt and rubbery state, The Avrami equation was u sed to analyze the isothermal crystallization kinetics of PEEKK. The A rami constant n is about 2 for the crystallization process from the me lt and 1.5 from the rubbery state. The activation energies for PEEKK a re 953.7 kJ/mol for crystallization from the melt and 932, 6 kJ/mol fo r crystallization from the rubbery state. The kinetic parameter k(g) i s 851.5 K.