Primary and secondary crystallization kinetic analysis of nylon 1212

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 isother...

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Bibliographic Details
Published in:Polymer international 2004-11, Vol.53 (11), p.1658-1665
Main Authors: Ren, Minqiao, Song, Jianbin, Zhao, Qingxiang, Li, Yuesheng, Chen, Qingyong, Zhang, Hongfang, Mo, Zhishen
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
nylon 1212
Physicochemistry of polymers
Polymer industry, paints, wood
primary crystallization
secondary crystallization
Technology of polymers
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Summary: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
ISSN:0959-8103
1097-0126
DOI:10.1002/pi.1490