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Flame retardant, non-combustible gas suffocation

Nov 07, 2019

According to the chain reaction theory of combustion, it is the free radicals required to sustain combustion. The flame retardant acts on the gas phase combustion zone to capture free radicals in the combustion reaction, thereby preventing the flame from propagating, reducing the flame density in the combustion zone, and ultimately reducing the combustion reaction rate until termination. For example, a halogen-containing flame retardant whose evaporation temperature and polymer decomposition temperature are the same or similar, when the polymer is thermally decomposed, the flame retardant also volatilizes. At this time, the halogen-containing flame retardant and the thermal decomposition product are in the gas phase combustion zone at the same time, and the halogen can capture the radicals in the combustion reaction, thereby preventing the flame from spreading, reducing the flame density in the combustion zone, and finally reducing the combustion reaction rate until the termination. .


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