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Isothermal and nonisothermal crystallization kinetics of nylon‐11
Author(s) -
Liu Siyang,
Yu Yingning,
Cui Yi,
Zhang Hongfang,
Mo Zhishen
Publication year - 1998
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19981219)70:12<2371::aid-app9>3.0.co;2-4
Subject(s) - kinetics , isothermal process , crystallization , materials science , thermodynamics , nylon 6 , chemical engineering , polymer science , polymer chemistry , composite material , polymer , physics , quantum mechanics , engineering
Analysis of the isothermal, and nonisothermal crystallization kinetics of Nylon‐11 is carried out using differential scanning calorimetry. The Avrami equation and that modified by Jeziorny can describe the primary stage of isothermal and nonisothermal crystallization of Nylon‐11. In the isothermal crystallization process, the mechanism of spherulitic nucleation and growth are discussed; the lateral and folding surface free energies determined from the Lauritzen–Hoffman equation are ς = 10.68 erg/cm 2 and ς e = 110.62 erg/cm 2 ; and the work of chain folding q = 7.61 Kcal/mol. In the nonisothermal crystallization process, Ozawa analysis failed to describe the crystallization behavior of Nylon‐11. Combining the Avrami and Ozawa equations, we obtain a new and convenient method to analyze the nonisothermal crystallization kinetics of Nylon‐11; in the meantime, the activation energies are determined to be −394.56 and 328.37 KJ/mol in isothermal and nonisothermal crystallization process from the Arrhonius form and the Kissinger method. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 70: 2371–2380, 1998