期刊
POLYMER DEGRADATION AND STABILITY
卷 95, 期 7, 页码 1183-1193出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2010.04.008
关键词
Poly(methyl methacrylate); PMMA; Fire-retardant; Thermal diffusivity; Nanocomposites; Metal oxide nanoparticles
资金
- Fonds National de la Recherche (FNR)
Possible relationships between fire-retardant properties and thermal diffusivity for poly(methyl methacrylate) (PMMA) filled by melt blending with titanium dioxide (TiO2), alumina (Al2O3) and boehmite (AlOOH) were investigated for a better understanding of the mode of action of metal oxides as fire-retardants (FR) in PMMA. Fire-retardancy was measured with a cone calorimeter and thermal diffusivity (a) by Laser Flash Analysis (LFA). LFA measurements have shown that heat dispersion is higher with titanium dioxide and boehmite than with alumina despite a larger surface area. For thermal diffusivity, discrepancies between the different nanofillers were only visible from 10 wt% onwards. Thermal degradation of PMMA-oxide nanocomposites and their thermal diffusivity could be linked. Moreover, a bi-linear relationship between the peak of heat release rate (pHRR) and the average of heat release rate (AHRR) showed the occurrence of a barrier effect. (C) 2010 Elsevier Ltd. All rights reserved.
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