Authors: Pedram Manafi Ismaeil Ghasemi Mohammad Karrabi Hamed Azizi Mohammad Reza Manafi Parvin Ehsaninamin
Publish Date: 2015/02/10
Volume: 72, Issue: 5, Pages: 1095-1112
Abstract
Thermal stability and thermal degradation kinetics of nanocomposites play an important role in many applications In this study nanocomposites based on poly lactic acid PLA/graphene containing 05 and 1 wt were prepared via solution method Functionalized graphene were prepared by acid treatment followed by grafting PLA on their surfaces The functionalized graphene was characterized using fourier transform infrared spectroscopy FTIR Raman elemental analysis Fourier transform infrared attenuated total reflection FTIRATR Dynamic mechanical thermal analysis DMTA and thermogravimetry analysis TGA The results revealed a successful functionalization reaction The morphology of nanocomposites was investigated by scanning electron microscopy SEM Thermal kinetics of samples was studied using TGA in multiple heating rates 5 10 20 and 30 °C/min Flynn–Wall–Ozawa FWO and Vyazovkin VYZ methods were considered as isoconversional models Although the assumptions of the applied models were different there was a good agreement between the models and obtained activation energies
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