Comparison of the nanoparticles performance in the photocatalytic degradation of a styrenebutadiene rubber nanocomposite

Journal of Applied Polymer Science Volume: 128 Issue: 4 Pages: 2368-2374 Published: 2012

(a) XRD pattern of anatase TiO2, (b) TEM image of TiO2 nanoparticles, (c) UV–visible spectroscopy of TiO2 nanoparticles, (d) XRD pattern of monoclinic ZrO2 nanoparticles, (e) TEM micrograph of ZrO2 nanoparticles, (f) UV–vis spectrum ZrO2 nanoparticles. Al indicates the aluminum substrate.

Writers: Tatiane M. Arantes, Renata L. Sala, Edson R. Leite, Elson Longo, Emerson R. Camargo

Keywords: degradation; nanocomposites; colloids; rubber; nanoparticles; nanowires; nanocrystals

Abstract: Much has been talking about the advantages of polymeric nanocomposites, but little is known about the influence of nanoparticles on the stability of these materials. In this sense, we studied the influence of both oxides of zirconium and titanium, known to have photocatalytic properties, as well as the influence of synthetic clay Laponite on the photodegradation of st yrene–buta-diene rubber (SBR). SBR nanocomposites were prepared by the colloidal route by mixing commercial polymer lattices and nanomet-ric anatase TiO2, monoclinic ZrOor exfoliated Laponite clays colloidal suspensions. To better understand the degradation mecha-nisms that occur in these nanocomposites, the efficiency of different photocatalysts under ultraviolet radiation was monitored by FTIR and UV–v is spectroscopies and by differential scanning calorimetric. It was observed that TiO2and ZrOnanoparticles undoubtedly acted as catalysts during the photodegradation process with different efficiencies and rates. However, when compared to pure SBR samples, the polymer degradation mechanism was unaffected. Unlike studies with nanocomposites montmorillonite, exfoli-ated laponite clay effectively acts as a photostabilizer of polymer UV photodegradation.

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 DOI: 10.1002/app.38281

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