INTECIN   20395
INSTITUTO DE TECNOLOGIAS Y CIENCIAS DE LA INGENIERIA "HILARIO FERNANDEZ LONG"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Nanocomposites based on polyhydroxybutyrate and different organically modified montmorillonites
Autor/es:
DAVID A D AMICO; LILIANA MANFREDI,; VIVIANA CYRAS; ANALIA VAZQUEZ
Lugar:
San Sebastián, España
Reunión:
Conferencia; V International Conference on Science and Technology of Composite Materials 09, COMATCOMP2009; 2009
Institución organizadora:
COMAT- Asociación de Materiales Compuestos de España
Resumen:
Development of polymer/clay nanocomposites is one of the latest revolutionary steps of the polymer technology. Preparation of blends or nanocomposites using low percentajes 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. Montmorilonite is among the most commonly used layered silicate because it is environmentally friendly and readily available in large quantities with realtively low cost. Therefore, the aim of this work is imporve the preoperties of biodegradable polymers by the addition of samll amounts of clay. Films were prepared from 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 hydrophobicity of films containing 2,4,6 and 10 wt.% of two MMTs were investigated. From X-Ray difraction analysis a different behavior was observed. The Cloisite Na showed an increment in their interlayer distance but the galleries of the Cloisite 15 A 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 the Cloisite Na and PHB film. These result could be related with the different crystallinity and morphology of the final materials.