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Abstract

Nano-Sb₂O₃/mica flame retardant composition is synthesized by colloidal and assembling techniques. The morphology and assembled behavior of nano-Sb₂O₃ on mica are analyzed by means of X-ray powder diffraction (XRD) and transmission electron microscopy (TEM). The flame retardant properties and mechanism of nano-Sb₂O₃ and nano-Sb₂O₃/mica composition are studied by combustion test, thermogravimetric (TG) analysis, and differential scanning calorimetry (DSC). The results show that the nano-Sb₂O₃ particles assembling in nano-Sb₂O₃/mica composition distribute on the mica surface with smaller size (about 5 nm), higher dispersivity, narrower size distribution and alike shapes, compared with nano-Sb₂ O₃ prepared by the normal method. The nano-Sb₂O₃/mica composition has achieved the same synergistic effects with chlorinated paraffin as nano-Sb₂O₃, and its flame retardant properties have been improved prominently through decreasing the temperature and combustion reaction rate of the polymer effectively and forming char. When the FRP sample contains about 7wt% nanocomposition (i.e., containing about 0.8 wt% mica), it is self-extinguished once departing from the fire while combusting.

Keywords

Sb2O3 nanoparticle mica flame retardant chlorinated paraffin.

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