Our continuing study of the mechanism of flammability reduction of polymer−layered-silicate nanocomposites has yielded results for polypropylene-graft-maleic anhydride and
polystyrene−layered-silicate nanocomposites using montmorillonite and fluorohectorite. Cone
calorimetry was used to measure the heat release rate and other flammability properties of
the nanocomposites, under well-controlled combustion conditions. Both the polymer−layered-silicate nanocomposites and the combustion residues were studied by transmission electron
microscopy and X-ray diffraction. We have found evidence for a common mechanism of
flammability reduction. We also found that the type of layered silicate, nanodispersion, and
processing degradation have an influence on the flammability reduction.
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