Article Dans Une Revue Polymer Degradation and Stability Année : 2004

Influence of Sb2O3 particles as filler on the thermal stability and flammability properties of poly(methyl methacrylate) (PMMA)

Résumé

The thermal stability behaviour and the flammability properties of poly(methyl methacrylate) (PMMA) filled with antimony oxide (Sb2O3), at different Sb2O3 amounts: 5, 10 and 20 wt%, were studied by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), cone calorimetry and limiting oxygen index (LOI) measurements. Samples were prepared using a twin-screw machine and subsequently injection molded. The experimental results obtained show that Sb2O3 particles retard the degradation and flammability of PMMA. The LOI increases to 24 for PMMA/Sb2O3 with just 20 wt% Sb2O3. An increase of the thermal stability between about 25 and 40 °C for 5–20 wt% of Sb2O3 was demonstrated by TGA in air. Cone calorimeter measurements showed that the heat release rate (HRR) significantly decreased in the presence of Sb2O3. Epiradiateur tests showed an increase of the ignition time between 10 and 20%. In a tentative way to establish how Sb2O3 acts as a flame retardant for PMMA, the activation energy of the thermal degradation was determined by the model-free isoconversional method of Vyazovkin.

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Dates et versions

hal-04665288 , version 1 (31-07-2024)

Identifiants

Citer

A Laachachi, M Cochez, M Ferriol, E Leroy, J. Lopez-Cuesta, et al.. Influence of Sb2O3 particles as filler on the thermal stability and flammability properties of poly(methyl methacrylate) (PMMA). Polymer Degradation and Stability, 2004, 85 (1), pp.641-646. ⟨10.1016/j.polymdegradstab.2004.03.003⟩. ⟨hal-04665288⟩
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