PLA nanocomposites: quantification of clay nanodispersion and reaction to fire
by S. Bourbigot, G. Fontaine, S. Duquesne, R. Delobel
International Journal of Nanotechnology (IJNT), Vol. 5, No. 6/7/8, 2008

Abstract: In this work, the morphology of polylactide (PLA)/clay nanocomposite is quantitatively characterised by a novel solid state NMR method. Depending on the preparation conditions (low or high shear stress), about half of the available polymer/clay interfacial area is formed and the degree of homogeneity characterising the distribution of this interfacial area is about 40% at high shear stress. On the contrary at low shear stress, montmorillonite (MMT) platelets are evenly dispersed in PLA associated with an available polymer/clay interfacial area close to one and high degree of homogeneity (81%). The presence of clay in PLA (exfoliated morphology) leads to a significant decrease of peak of heat release rate measured by cone calorimetry by oxygen consumption.

Online publication date: Sat, 14-Jun-2008

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