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Primary and secondary crystallization kinetic analysis of nylon 1212
Author(s) -
Ren Minqiao,
Song Jianbin,
Zhao Qingxiang,
Li Yuesheng,
Chen Qingyong,
Zhang Hongfang,
Mo Zhishen
Publication year - 2004
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1490
Subject(s) - crystallization , isothermal process , nucleation , materials science , differential scanning calorimetry , spherulite (polymer physics) , crystallite , crystal growth , chemical engineering , thermodynamics , crystallography , chemistry , metallurgy , physics , engineering
The isothermal and non‐isothermal melt‐crystallization kinetics of nylon 1212 were investigated by differential scanning calorimetry. Primary and secondary crystallization behaviors were analysed based on different approaches. The results obtained suggested that primary crystallization under isothermal conditions involves three‐dimensional spherulite growth initiated by athermal nucleation, while under non‐isothermal conditions, the mechanism of primary crystallization is more complex. Secondary crystallization displays a lower‐dimensional crystal growth, both in the isothermal and non‐isothermal processes. The crystallite morphology of nylon 1212, isothermally crystallized at various temperatures, was observed by polarized optical microscopy. The activation energies of crystallization under isothermal and non‐isothermal conditions were also calculated based on different approaches. Copyright © 2004 Society of Chemical Industry