Thermophysical analysis and modeling of the crystallization and melting behavior of PLA with talc
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Publication Details
Author list: Refaa Z, Boutaous M, Xin SH, Siginer DA
Publisher: Springer Verlag (Germany) / Akadémiai Kiadó
Place: DORDRECHT
Publication year: 2017
Journal: Journal of Thermal Analysis and Calorimetry (1388-6150)
Journal acronym: J THERM ANAL CALORIM
Volume number: 128
Issue number: 2
Start page: 687
End page: 698
Number of pages: 12
ISSN: 1388-6150
eISSN: 1588-2926
Languages: English-Great Britain (EN-GB)
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Abstract
The crystallization kinetics and the melting behavior of PLA and PLA with talc are investigated by dynamic scanning calorimeter and optical microscopy. The polymorphic aspect of PLA was highlighted by analyzing the melting process throughout heating after isothermal crystallization. The melting process of PLA with 5 mass% talc (PLAT5) shows the same thermal transitions as for PLA alone. The thermodynamic melting temperature of PLA and PLAT5 is determined to be 167.7 A degrees C. The effects of the temperature and the cooling rate on the crystallization kinetics of PLA are analyzed. Finally, a simple and efficient protocol is defined to model the isothermal and the non-isothermal crystallization taking into account the polymorphism of PLA. Good agreement is found between the predictions of the proposed model and the experimental results under isothermal and non-isothermal conditions.
Keywords
Calorimetric analysis, Crystal forms, Crystallization kinetics, Melting process, Nucleation, Polylactide (PLA)
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