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Thermal Properties of Poly(L‐lactide)/Calcium Carbonate Nanocomposites
Author(s) -
Andričić Branka,
Kovačić Tonka,
Perinović Sanja,
Grgić Adela
Publication year - 2008
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200850312
Subject(s) - differential scanning calorimetry , thermogravimetry , materials science , extrusion , nanocomposite , glass transition , crystallization , calcium carbonate , thermal stability , chemical engineering , composite material , polymer , thermodynamics , physics , engineering
Summary: Thermal properties of nanocomposites prepared of poly(L‐lactide) (PLLA) and CaCO 3 applying differential scanning (DSC) calorimetry and thermogravimetry (TG) were studied. Nanocomposites were prepared by extrusion process at 170 °C. DSC measurements show that CaCO 3 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 CaCO 3 addition.