INTEMA   05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Polymeric matrices reinforced with organo-modified nanoclays: effect of modifier chain length on the nanoclays and nanocomposites performance
Autor/es:
EVELYN GARAYOA; TOBIAS SALINAS; MATIAS LANFRANCONI; VERA ALVAREZ
Lugar:
Buenos Aires
Reunión:
Conferencia; VI International conference on science and technology of composite materials, COMAT 2015; 2015
Resumen:
In this work the chemical-physical properties of sodic bentonites modified by cationic exchange with ammonium salts of different carbonated chain length were studied. The modifications were carried out in order to make them compatible with polymeric matrices.Polymers are widely used in several industrial applications because of their outstanding characteristics. Nevertheless, these polymers exhibited a series of drawbacks related with their low mechanical and barrier properties. An interesting option to improve the performance of polymeric matrices is to incorporate layered silicate producing nanocomposites but the possibility of improving the general behavior of such kind of materials depends on the dispersion of the clay inside the matrix which is in turns related with the polymer/clay compatibility. With the aim of enhancing the dispersion of the clay inside the polymeric matrices, layered silicates can be modified by means of ion exchange reactions with quaternary salts.In this work, the neat bentonite was ion exchanged with quaternary ammonium salts of different chain lengths. All modified clays were characterized by means of X-Ray Diffraction, Thermogravimetric Analysis (TGA) and water absorption tests. In addition, the structure of polymer/organoclay nanocomposites was investigated by X-Ray Diffraction and the thermal and mechanical properties, of nanocomposites were also investigated.