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Thermal degradation kinetics of g-HA/PLA composite |
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| Authors: | Jia Li Wei Zheng Li Li Yufeng Zheng X Lou |
| Institution: | aCenter for Biomedical Materials and Engineering, Harbin Engineering University, Harbin 150001, China;bSchool of Chemistry and Environmental Engineering, Harbin University of Science and Technology, Harbin 150040, China;cDepartment of Chemical Engineering, Curtin University of Technology, Kent Street, Bentley WA9102, Australia |
| Abstract: | Thermal degradation behaviors of a composite constituted by poly(l-lactide) (PLA) and hydroxyapatite nanoparticle that was surface-grafted with l-lactic acid oligomer (g-HA) in a nitrogen atmosphere were studied using thermogravimetric analysis (TGA) and compared with PLA. The kinetic models and parameters of the thermal degradation of PLA and the g-HA/PLA composite were evaluated by the invariant kinetic parameters (IKP) method and Flynn–Wall–Ozawa (FWO) method based on a set of TGA data obtained at different heating rates. It was shown that the conversion functions calculated by means of the IKP method depend on a set of kinetic models. The g-HA particle slowed down the thermal degradation of PLA polymer matrix. |
| Keywords: | Polylactide Hydroxyapatite Invariant kinetic parameters method Thermal degradation |
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