Intumescent mineral fire retardant systems in ethylene-vinyl acetate copolymer: Effect of silica particles on char cohesion

被引：37

作者：

Centre des Matériaux de Grande Diffusion, Ecole des Mines d'Alès, 6, avenue de Clavières, 30319 Alès Cedex, France ^{[1
]}

机构：

[1] Centre des Matériaux de Grande Diffusion, Ecole des Mines d'Alès, 30319 Alès Cedex, 6, avenue de Clavières

来源：

Polym Degradation Stab | 2006年 / 9卷 / 2140-2145期

关键词：

Char; EVA; Fire properties; Intumescence;

D O I：

10.1016/j.polymdegradstab.2006.01.010

中图分类号：

学科分类号：

摘要：

Silica particles of different physical properties (particle size, morphology and specific surface area) were introduced into an ethylene-vinyl acetate copolymer filled with an intumescent mineral fire retardant system containing magnesium hydroxide and organo-modified montmorillonites. The effect of silica particles on the cohesion and strength of the foamed combustion residue was studied by micro-indentation, concurrently with the characterization of material's fire behavior. Silica particles seem to act as defects that generate cracks, decreasing the strength of the residue. This generation of cracks is connected to a lower cohesion of the residue, especially for silica particles of high specific surface area. In parallel, the presence of silica of high specific surface area, despite tending to decrease Time To Ignition, also improves self-extinguishing ability, thanks to a better thermal stability at higher temperatures, and reduces the maximum Heat Release Rate in cone calorimeter tests. © 2006 Elsevier Ltd. All rights reserved.

引用

页码：2140 / 2145

页数：5

共 11 条

[1]

Montezin F., Lopez-Cuesta J.M., Crespy A., Georlette P., Flame retardant and mechanical properties of a copolymer PP/PE containing brominated compounds/antimony trioxide blends and magnesium hydroxide or talc, Fire Mater, 21, 6, pp. 245-252, (1997)

[2]

Particulate-filled polymer composites, (1995)

[3]

Beyer G., Flame retardancy of nanocomposites - from research to technical products, J Fire Sci, 23, pp. 75-87, (2005)

[4]

Conference flame retardants, (1992)

[5]

Beyer G., Flame retardant properties of EVA-nanocomposites and improvements by combination of nanofillers with aluminium trihydrate, Fire Mater, 25, 5, pp. 193-197, (2001)

[6]

Clerc L., Ferry L., Leroy E., Lopez-Cuesta J.M., Influence of talc physical properties on the fire retarding behaviour of (ethylene-vinyl acetate copolymer/magnesium hydroxide/talc) composites, Polym Degrad Stab, 88, 3, pp. 504-511, (2005)

[7]

Ferry L., Gaudon P., Leroy E., Lopez-Cuesta J.M., Fire retardancy of polymers: new applications of mineral fillers, Intumescence in ethylene-vinyl acetate copolymer filled with magnesium hydroxide and organoclays, pp. 302-312, (2005)

[8]

Fire retardancy of polymers: the use of intumescence, (1998)

[9]

Sneddon I.N., The relation between load and penetration in the axisymetric Boussinesq problem for a punch of arbitrary profile, Int J Eng Sci, 3, pp. 47-57, (1965)

[10]

Oliver W.C., Pharr G.M., An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation, J Mater Res, 7, pp. 1564-1580, (1992)

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