Fire-retardant Additives for Polymeric Materials-I. Char Formation from Silica Gel-Potassium Carbonate

摘要

Silica gel combined with potassium carbonate is an effective fire retardant for a wide variety of common polymers (at mass fraction of only 10/100 total additive) such as polypropylene, polymethylmethacrylate, poly(vinyl alcohol), cellulose, and to a lesser extent polystyrene and styrene-acrylonitrile. The peak heat release rate is reduced by up to 68/100 without significantly increasing the smoke or carbon monoxide levels during the combustion.