The possible effect of temperature stability of OLS (Organic Layered Silicates) on the structure and flammability behavior of Polymer/MMT nanocomposites was discussed in a previous publication.Above 200 deg C,the OLS begins to decompose,and the nanocomposite structure is gradually destroyed even before the pyrolysis and combustion.Data on the decomposition of polymer/OLS mixtures upon isothermal TGA experiments are presented,and include rates and energies of activation at a range of temperatures from 200 deg C to 400 deg C.Decomposition of OLS in the presence of polymer is discussed in view of the decomposition of clay,pristine surfactant,and OLS.Accumulation of clay by migration to the surface of samples at a range of temperatures is indicated by x-ray diffraction (XRD) and attenuated total reflectance Fourier transform infra red (ATR-FTIR) measurements on the isothermally heated samples.Mechanistic considerations concerning changes in the structure of the nanocomposite,the decomposition of OLS,and migration of clay will be presented.
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