INTEMA   05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Nanocomposites based on Polyhydroxybutyrate and different organically modified Montmorillonites
Autor/es:
D.A.D'AMICO; L. B. MANFREDI; V. P. CYRAS; A. VÁZQUEZ
Lugar:
San Sebastián, España
Reunión:
Congreso; V International Conference on Science and Technology of Composite Materials - 8° Congreso Nacional de Materiales Compuestos (COMATCOMP 2009); 2009
Institución organizadora:
Asociación Española de Materiales Compuestos
Resumen:
Development of polymer/clay nanocomposites is one of the latest revolutionary steps of the polymer technology. Preparation of blends or nanocomposites using low percentages of inorganic fillers is among the routes to improve some of the properties of biodegradable polymers such as barrier, thermal and oxidative, when compared with traditional composites. Montmorillonite (MMT) is among the most commonly used layered silicates because it is environmentally friendly and readily available in large quantities with relatively low cost. Therefore, the aim of this work is to improve the properties of biodegradable polymers by the addition of small amounts of clay. Films were prepared from a polyhydroxybutirate (PHB) solution by casting. Nanocomposites were similarly obtained by the addition of different percentages and type of MMT to the polymer. Crystallinity, thermal degradation and hidrophobicity of films containing 2, 4, 6 and 10 wt% of two MMTs were investigated. From X-Ray diffraction analysis a different behaviour was observed. The Cloisite® Na+ showed an increment in their interlayer distance, but the galleries of the Cloisite® 15A contract during the formation of the film. On the other hand, the thermal resistance of the composites containing the modified MMT was higher than the ones with Cloisite® Na+ and PHB film. These results could be related with the different crystallinity and morphology of the final materials.