KE Yangchuan, WU Zhongwen, ZHENG Yubin, YANG Decai. CRYSTALLIZATION AND CRYSTAL STRUCTURE FOR POLY (ARYL ETHER KETONE) CONTAINING META PHENYL LINKS[J]. Acta Polymerica Sinica, 1997,(2):177-182.
KE Yangchuan, WU Zhongwen, ZHENG Yubin, YANG Decai. CRYSTALLIZATION AND CRYSTAL STRUCTURE FOR POLY (ARYL ETHER KETONE) CONTAINING META PHENYL LINKS[J]. Acta Polymerica Sinica, 1997,(2):177-182.DOI:
Crystallization and crystal structure of poly(aryl ether ketone)s containing meta phenyl links were studied.WAXD results showed that crystallized from both glassy and melting state
only one crystal form of PEKMK was found with unit cell parameters of a=0.767 2nm
b =0.6149nm
and c =1.599nm.DSC results from different crystallization showed that double melting peaks (lower and upper peaks)exits.Lower peak had only 4% to 7% of all heat of fusion which originated from random lamellae produced at low crystallization temperature.At high crystallization temperature
lower peak transformed into upper peak with equillinrium melting point of 295℃.