دانلود Fire retardant action of mineral fillers

ترجمه فارسی: Fire retardant action of mineral fillers
قیمت : 315,000 ریال
شناسه محصول : 2009072
نویسنده/ناشر/نام مجله : Polymer Degradation and Stability
سال انتشار: 2011
تعداد صفحات انگليسي : 8
نوع فایل های ضمیمه : pdf+word
حجم فایل : 583 Kb
کلمه عبور همه فایلها : www.daneshgahi.com
عنوان انگليسي : Fire retardant action of mineral fillers

چکیده

Abstract

Endothermically decomposing mineral fillers, such as aluminium or magnesium hydroxide, magnesium carbonate, or mixed magnesium/calcium carbonates and hydroxides, such as naturally occurring mixtures of huntite and hydromagnesite are in heavy demand as sustainable, environmentally benign fire retardants. They are more difficult to deploy than the halogenated flame retardants they are replacing, as their modes of action are more complex, and are not equally effective in different polymers. In addition to their presence (at levels up to 70%), reducing the flammable content of the material, they have three quantifiable fire retardant effects: heat absorption through endothermic decomposition; increased heat capacity of the polymer residue; increased heat capacity of the gas phase through the presence of water or carbon dioxide. These three contributions have been quantified for eight of the most common fire retardant mineral fillers, and the effects on standard fire tests such as the LOI, UL 94 and cone calorimeter discussed. By quantifying these estimable contributions, more subtle effects, which they might otherwise mask, may be identified.

Keywords: Aluminium hydroxide ATH Fire Flame Retardant
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