Volume 137, Issue 5 48340
Article

Nonisothermal crystallization kinetics of PLA/nanosized YVO4 composites as a novel nucleating agent

Safaa H. El-Taweel

Corresponding Author

Safaa H. El-Taweel

Chemistry Department, Faculty of Science, Cairo University, Orman-Giza, 12613 Egypt

Correspondence to: S. H. El-Taweel (E-mail: [email protected])Search for more papers by this author
Mostafa Abboudi

Mostafa Abboudi

Chemistry Department, Faculty of Science, Taibah University, Al-MadinahAl-Munawarah, 30002 Saudi Arabia

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First published: 05 August 2019
Citations: 15

ABSTRACT

The influence of nanosized YVO4 particles as a novel and efficient nucleating agent on the nonisothermal crystallization behaviors of poly(lactic acid) (PLA) was studied. A modified Avrami model was utilized to describe the nonisothermal crystallization kinetics of pure PLA and PLA nanocomposites. The differential isoconversional Friedmann formula was employed to calculate the effective activation energies (EX(t)) of nonisothermal crystallization from the glass state. The results showed that modified Avrami methods describe the nonisothermal crystallization kinetics of pure PLA and PLA nanocomposites well. The crystallization rate of PLA/1 mass% YVO4 was faster than that of pure PLA sample by factor 5 × 103 at a heating rate of 1 K min−1. While the values of Lauritzen–Hoffman parameters (Kg and U*) of the PLA/YVO4 nanocomposites were lower than those of pure PLA, indicating the nucleation efficiency of nanosized YVO4 particles for PLA. Scanning electron microscopy images reflect the uniform dispersion of 1 mass% YVO4 in PLA matrix. Thermogravimetric analysis results revealed that the thermal degradation parameters are slightly lowered by 7 °C on increasing the mass percentage of YVO4 in the PLA nanocomposites. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48340.

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