Effect of magnesium dihydroxide nanoparticles on thermal degradation and flame resistance of PMMA nanocomposites |
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| Authors: | Fouad Laoutid Rodolphe Sonnier Damien Francois Leila Bonnaud Nicolas Cinausero José‐Marie Lopez Cuesta Philippe Dubois |
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| Institution: | 1. Center of Innovation and Research in Materials & Polymers (CIRMAP), Laboratory of Polymeric and Composite Materials (LPCM), University of Mons & Materia Nova Research Center, Place du Parc 20, 7000 Mons, Belgium;2. Ecole des Mines d'Alès (CMGD), 6, Avenue de Clavières, 30319 Alès Cedex, France |
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| Abstract: | The influence of magnesium dihydroxide (MDH) nanoparticles on thermal degradation and fire behavior of poly(methyl methacrylate) (PMMA) has been investigated by thermogravimetric analysis (TGA), cone calorimeter, and pyrolysis‐combustion flow calorimeter (PCFC) tests, respectively. MDH nanoparticles with either lamellar or fibrous shape have been synthesized via a sol‐gel technique and characterized by transmission electron microscopy (TEM) and X‐ray diffraction analysis. PMMA–MDH nanocomposites have been prepared by melt blending the recovered MDH nanoparticles within PMMA at different loadings (5, 10, and 20 wt% MDH). According to TGA results, the incorporation of lamellar or fibrous MDH nanoparticles into PMMA leads to a significant improvement in PMMA thermal stability, both under air and inert atmosphere. The results obtained by PCFC and cone calorimeter tests show an important decrease in the peak of heat release rate (pHRR) concomitant with charring during the combustion. Lamellar MDH nanoparticles were found to be more efficient than fibrous MDH nanoparticles. Copyright © 2010 John Wiley & Sons, Ltd. |
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| Keywords: | poly(methyl methacrylate) PMMA nanocomposite magnesium dihydroxide nanoparticles thermal degradation fire retardancy cone calorimeter |
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