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Isothermal crystallization of poly(vinyl alcohol–co–ethylene)

✍ Scribed by Vera A. Alvarez; José M. Kenny; Analía Vázquez

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
139 KB
Volume
89
Category
Article
ISSN
0021-8995

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✦ Synopsis

Abstract

Isothermal melt crystallization of poly(vinyl alcohol–co–ethylene) with different ethylene contents was studied in the temperature range of 140°C–160°C. A differential scanning calorimeter was used to follow the energy of the crystallization process. The results were analyzed by Avrami and Hoffman–Laurizten methods. The Avrami exponent was close to 2, indicating two‐dimensional growth with a linear growth rate and crystals nucleating athermally. The equilibrium melting temperature was determined by the Hoffman–Weeks method. The rate of crystallization depended on ethylene content and temperature. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 1071–1077, 2003

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