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Nonisothermal crystallization behavior of poly(aryl ether ether ketone)
Author(s) -
Seo Yongsok,
Kim Sehyun
Publication year - 2001
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.10793
Subject(s) - crystallization , materials science , ether , differential scanning calorimetry , peek , thermodynamics , isothermal process , exponent , avrami equation , kinetic energy , polymer chemistry , chemical engineering , composite material , organic chemistry , crystallization of polymers , polymer , chemistry , physics , linguistics , philosophy , quantum mechanics , engineering
A study has been made of the crystallization behavior of poly(aryl ether ether ketone), PEEK, under nonisothermal conditions. A differential scanning calorimeter (DSC) was used to monitor the energetics of the crystallization process from the melt. For nonisothermal studies, the melt was crystallized by cooling at rates from 1°C/min to 10°C/min. A kinetic analysis based on the recently proposed model for nonisothermal crystallization kinetics to remedy the drawback of the Ozawa equation was applied. The Avrami exponent for the nonisothermal crystallization process was strikingly different from that of the isothermal process, which indicates different crystallization behaviors. The results agree with the morphological observation reported in the literature. This study shows that correct interpretation of the Avrami exponent provides valuable information about the crystal structure and its morphology.