INVESTIGADORES
MANFREDI liliana Beatriz
congresos y reuniones científicas
Título:
EFFECT OF DIFFERENT ORGANIC MODIFIERS ON THE CRYSTALLIZATION KINETICS OF POLY(3-HYDROXIBUTYRATE) NANOCOMPOSITES BASED ON MODIFIED CLAYS
Autor/es:
D.A.DAMICO; L. B. MANFREDI; V. P. CYRAS
Lugar:
Praga
Reunión:
Conferencia; Conference on polymer modification, degradation and stabilization (Modest 2012); 2012
Institución organizadora:
Institute of Macromolecular Chemistry, and Academy of Sciences of the Czech Republic
Resumen:
Poly(hydroxybutyrate) (PHB) is produced as intracellular storage materials by different types of microorganisms from renewable sources. Not only they are biodegradable and biocompatible, but they can also be produced by bacterial fermentation from renewable resources like cane sugar. Films of PHB and its nanocomposites with the addition of 4% of different commercial clays (CNa+, C93A, C15A) were obtained by casting process1. Thermal behavior and crystallization kinetics were performed by calorimetry.The effective activation energy was calculated through the model-free isoconversional method.It can be concluded that the incorporation of the C15A clay decreases the crystallization rate of PHB chains, without increasing the level of crystallinity. It was related to the best dispersion of this type of clay in the polymer. So, the crystallization kinetics was greatly affected by the structure and dispersion of the clay. Different type of clay organic modifiers results in different effects on the crystallization behavior of PHB.