Organically-modified montmorillonite (MMT) clays have been prepared using ammonium salts containing
quinoline, pyridine, benzene, and styrenic groups. The nanocomposites were prepared by
melt blending and the formation of nanocomposites was characterized using X-ray diffraction (XRD)
and transmission electron microscopy (TEM). Thermal stability and flammability were evaluated by
thermogravimetric analysis (TGA) and cone calorimetry measurements, respectively. The presence
ofmodified MMT at 5% loading resulted in significant improvement in thermal stability compared
to the virgin polymer. Effective activation energies for mass loss were determined via a model-free
isoconversional approach from TGA data obtained under N2 and under air. The additives served to
raise the activation energy, with a more significant impact observed under pyrolysis conditions. The
onset temperature ofdeg radation and temperature ofmaxim um decomposition rate are increased,
while the peak heat release rate and mass loss rates are significantly reduced in the presence of
three ofthe modified clays. No reduction in the total heat released is observed
Organically-modified montmorillonite (MMT) clays have been prepared using ammonium salts containingquinoline, pyridine, benzene, and styrenic groups. The nanocomposites were prepared bymelt blending and the formation of nanocomposites was characterized using X-ray diffraction (XRD)and transmission electron microscopy (TEM). Thermal stability and flammability were evaluated bythermogravimetric analysis (TGA) and cone calorimetry measurements, respectively. The presenceofmodified MMT at 5% loading resulted in significant improvement in thermal stability comparedto the virgin polymer. Effective activation energies for mass loss were determined via a model-freeisoconversional approach from TGA data obtained under N2 and under air. The additives served toraise the activation energy, with a more significant impact observed under pyrolysis conditions. Theonset temperature ofdeg radation and temperature ofmaxim um decomposition rate are increased,while the peak heat release rate and mass loss rates are significantly reduced in the presence ofthree ofthe modified clays. No reduction in the total heat released is observed
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