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Analysis of crystallization kinetics of poly(ether ether ketone) by a nonisothermal method

โœ Scribed by Ming Chen; Chia-Ting Chung

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
154 KB
Volume
36
Category
Article
ISSN
0887-6266

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โœฆ Synopsis

During cooling at a rate of 10ยฐC/min from the melt state of PEEK we have followed the growth of spherulites using an optical microscope equipped with a camera. The isothermal growth rates of crystallization in the temperature range of 266 -308ยฐC could be estimated by means of a differential equation. These continuous growth rate data were used further for kinetic analysis, which indicated that PEEK exhibited an unmistakable regime II 3 III transition at 296ยฐC. The results compared favorably with those obtained by the traditional isothermal method, which is time consuming. Due to chain folding, the Thomas-Staveley constant should be closer to 0.25 instead of 0.1 or 0.3.

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