Isothermal and nonisothermal crystallization kinetics of nylon-11

• Published in: Journal of applied polymer science 1998-12, Vol.70 (12), p.2371-2380
• Main Authors: Liu, Siyang, Yu, Yingning, Cui, Yi, Zhang, Hongfang, Mo, Zhishen
• Format: Article
• Language: English
• Subjects: activation energy; Applied sciences; Crystallization; differential scanning calorimetry; Exact sciences and technology; isothermal and nonisothermal crystallization kinetics; nylon-11; Organic polymers; Physicochemistry of polymers; Properties and characterization
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/(SICI)1097-4628(19981219)70:12<2371::AID-APP9>3.0.CO;2-4

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/cm2 and ςe = 110.62 erg/cm2; 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