engleski

Thermal Properties of Poly(L-lactide)/calcium carbonate Nanocomposites

Thermal properties of nanocomposites prepared of poly(L-lactide) (PLLA) and CaCO3 applying differential scanning (DSC) calorimetry and thermogravimetry (TG) were studied. Nanocomposites were prepared by extrusion process at 170°C. DSC measurements show that CaCO3 has no influence on glass transition and melting point of PLLA but lowers its cold crystallization temperature. There is no difference in glass transition temperature of PLLA before and after extrusion. High temperature thermal stability of the PLLA in the composites is poorer than neat PLLA. Kinetic parameters also indicate greater reactivity of the system upon CaCO3 addition.

poly(L-lactide); nanocomposites; DSC; TGA; activation energy

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