Abstract:

The synergy of boron - aluminum in the intumescent flame retardant PP was studied using thermal analysis and cone calorimeter. The thermal analysis showed that when introducing aluminum into KDIFR, the charred residue was reduced to 14.6% owing to catalytic dehydration; when adding boron in KDIFR, the charred residue was reduced to 5.9% owing to boron can promote the generation of small combustible molecule and catalytic degradation. When B-Al co-existing, the decomposition rate in the high temperature zone reduce, and the charred residue increased to 19.7%. The cone calorimeter showed that the addition of either aluminum or boron increased the heat release rate, total heat release, CO, CO₂, and smoke emissions, with boron being more effective in pre-combustion and smoke inhibition. The co-existing of B-Al in the KDIFR can reduce heat release rate, total heat release, CO, CO₂ and smoke emissions significantly and enhance the flame retardant effect greatly.

Key words: Polypropylene, boron-aluminium, FONT-FAMILY: Arial, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体">intumescent flame retardant, thermal analysis, cone calorimeter