Isoconversional Analysis of Combined Melt and Glass Crystallization Data

• Published in: Macromolecular chemistry and physics Vol. 207; no. 1; pp. 20 - 25
• Main Authors: Vyazovkin, Sergey, Dranca, Ion
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 03.01.2006; WILEY‐VCH Verlag; Wiley
• Subjects: activation energy; Applied sciences; Crystallization; DSC; Exact sciences and technology; isoconversional method; kinetics; Organic polymers; Physicochemistry of polymers; Properties and characterization; Ethylene terephthalate polymer; Differential scanning calorimetry; isoconversional method; Ethylene naphthalate polymer; Ester polymer; activation energy: crystallization; Experimental study; Melt crystallization; Naphthalate polymer; DSC; Non isothermal condition; Kinetics; Kinetic parameter; Activation energy; Computing method
• ISSN: 1022-1352; 1521-3935
• DOI: 10.1002/macp.200500419

As proposed earlier (Macromol. Rapid Commun., 2004, 25, 733) the Kg and U* parameters of the Hoffman‐Lauritzen theory can be derived from isoconversional analysis of DSC data on melt crystallization. In this study, the analysis is extended to include both melt and glass crystallization data. The analysis of DSC data on non‐isothermal crystallization of poly(ethylene terephthalate) (PET) and poly(ethylene 2,6‐naphthalate) (PEN) demonstrates that for each of these polymers the combined melt and glass crystallization data can be described by single set of the Kg and U* values. The respective values for PET are 3.6 × 105 K2 and 7.5 kJ · mol−1 and for PEN 2.2 × 105 K2 and 6.6 kJ · mol−1. The use of combined data sets helps to improve the precision of computations. Experimental E on T data for melt (circles) and glass (squares) crystallization of PET.