Isothermal and nonisothermal crystallization kinetics of nylon-11

✍ Scribed by Siyang Liu; Yingning Yu; Yi Cui; Hongfang Zhang; Zhishen Mo

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 221 KB
• Volume: 70
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19981219)70:12<2371::aid-app9>3.0.co;2-4

✦ Synopsis

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 ϭ 10.68 erg/cm 2 and e ϭ 110.62 erg/cm 2 ; and the work of chain folding q ϭ 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 Ϫ394.56 and 328.37 KJ/mol in isothermal and nonisothermal crystallization process from the Arrhonius form and the Kissinger method.