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Titanium dioxide nanotubes, surface modified with phenl dichlorophosphate, were incorporated in polystyrene by in situ bulk radical polymerization. The modified Titanium dioxide nanotubes were characterized using fourier transform infrared spectrometry, and thermo-gravimetric analysis. The influences of the modified Titanium dioxide nanotubes on the thermal properties of the PS were investigated using TGA. These results show that the glass transition temperature and thermal stabilities of the nanocomposites were improved. Thermo-gravimetric analysis/infrared spectrometry analyses of the gas products of PS-TNTs nanocomposites confirmed the degradation pathway of polystyrene had been changed. [ABSTRACT FROM PUBLISHER]

Novel PS composites with improved combustion properties were prepared by using OctaTMA-POSS and OctaTMA-POSS-based lamellar hybrids. The lamellar hybrids were prepared via template-directed synthesis from OctaTMA-POSS and surfactants. The microstructures of composites were characterized by TEM, which showed that POSS-based fillers dispersed well in the polymer. The combustion properties were evaluated by cone calorimeter, which indicated that peak HRR, CO release rates, and CO concentration were effectively improved. However, the limited oxygen indexes (LOI) of the samples were not changed significantly, and the ignition time in the cone test was earlier than that of pure PS. [ABSTRACT FROM AUTHOR]

Novel PS composites were prepared by adding lamellar hybrid made up of octa(γ-chloroaminopropyl) POSS and surfactant. TEM images show that the nanofillers are dispersed well in the composites. Cone calorimeter tests show that the values of peak HRR of the composites with 1 wt%, 3 wt%, 5 wt% and 10 wt% of nanofillers are 469.3 kW/m2, 492.9 kW/m2, 511.4 kW/m2 and 477.3 kW/m2, respectively. Comparied to PS, the relative decreases are 51.4%, 49.0%, 47.1%, 50.6%, respectively. The CO release rate and CO concentration are also decreased dramatically. TGA test shows the influences on the decomposition temperature and char residue of the composites by different filler contents. [ABSTRACT FROM AUTHOR]