Filler matrix interface characteristics and mechanical reinforcement in elastomeric nanocomposites

This work studied rubber-clay nanocomposites, in particular: filler-elastomer interface, multiscale clay organization in the rubber matrix, both in the absence and in the presence of C black, hybrid clay/C black filler network, dynamic-mech. properties of raw and S-cured compds. Studies performed with various techniques such as ESR spin labeling, Solid State NMR, TEM and x-ray diffraction pattern allowed to observe a nice distribution and dispersion of the layered clay, with the development of filler-matrix interface. Composites were prepd. with either intercalated or exfoliated organoclays, both in the absence and in the presence of C black, observing in the latter case the formation of a hybrid filler network formed by layered and spherical particles. Dynamic-mech. studies revealed that the replacement of a part of C black with an organoclay promotes a stronger filler-rubber interaction. The exfoliated organoclay is demonstrated as the ideal filler for compds. that have to explore a wide range of temps., as it gives rise to a better stability of properties.