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Crystallization behavior of poly(N-methyldodecano-12-lactam). III. Kinetics of isothermal crystallization by J. Kratochvíl; A. Sikora is a Materials Science article available to read on EtoBox.

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## Abstract Differential scanning calorimetry, combined with Avrami theory, was used to investigate the kinetics of three steps of the complex crystallization process of poly(__N__‐methyldodecano‐12‐lactam) (MPA): (1) primary melt crystallization at respective crystallization temperature (__T__~__c__~), (2) additional crystallization at 30°C, and (3) recrystallization at 54°C. Kinetics of the three steps was discussed with respect to __T__~__c__~. The Avrami exponent __n__ of primary melt crystallization decreased between 2.5 and 1.9 in the range of __T__~__c__~ values of −10 to 20°C, which suggests heterogeneous nucleation, followed by two‐dimensional growth, with a larger involvement of homogeneous thermal nucleation at greater supercoolings. The crystallization rate constant __k__ decreased with increasing __T__~__c__~. The value of __n__ = 1.5 for additional crystallization implies a two‐dimensional diffusion‐controlled crystal growth with a suppressed nucleation phase. For __T__~__c__~ values ranging from −10 to 0°C and 0 to 20°C, __k__ showed weak and quite strong decreasing dependencies on __T__~__c__~, respectively. The recrystallization mechanism involved partial melting o

Who reads Crystallization behavior of poly(N-methyldodecano-12-lactam). III. Kinetics of isothermal crystallization?

Author

J. Kratochvíl; A. Sikora

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0021-8995)

Published

2004

Language

EN

Field

Materials Science (Physical Sciences)