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Morphology and Failure in Nanocomposites

Nanocomposites are heterogeneous systems where the significant volume fraction of polymer is affected and strongly interacted by the very small nano-sized filler particles. For our studies we have selected the filler kaolin and calcium carbonate (CaCO3) that were introduced in copolymer poly(acrylate) (PA) matrix and poly(vinyl acetate) (PVAc) matrix respectively, by simple mixing in aqueous dispersion and extracting water to produce the thin films. Throughout the presentation we demonstrate how microscopic (SEM), X-ray scattering (WAXD), thermal (DSC) and mechanical tools were employed to interrogate the structures and properties of these heterogeneous materials. The PA/kaolin and PVAc/CaCO3 nanocomposites all failed cohesively in the matrix. The nature of reinforcing which assures the inorganic phase was determined throughout the interaction coefficients, calculated from the models which showed the best fitting to the experiments. The results illustrated the improved mechanical properties as a result of existing the strong interfacial interactions between the matrix and nanofiller.

Nanofillers; nanocomposite morphology; mechanical properties; interaction coefficients; poly(acrylate) and poly(vinyl acetate) composites

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