Journal
POLYMER DEGRADATION AND STABILITY
Volume 88, Issue 3, Pages 444-455Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2004.11.016
Keywords
spent FCC catalyst; flame retardancy; intumescence; ammonium polyphosphate; pentaerythritol
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Spent oil-cracking catalyst from the FCC process was incorporated into an ammonium polyphosphate and pentaerythritol intumescent mixture, both as received, and after milling and sifting. The influence of the catalyst's average particle size on flame retardancy performance was investigated by UL-94 rating standard, limiting oxygen index (LOI), thermogravimetric analysis (TGA) and cone calorimetry. The effect of each of the catalyst's components on the fire resistance of the final composite was also studied. The results show that the best flame-retarding properties are obtained with the finest catalyst fraction and that, of all its components, only the silica-aluminates, such as kaolin and zeolite, affect flame performance to a significant extent. (c) 2004 Elsevier Ltd. All rights reserved.
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