The essence of combustion and flame retardant mechanism
The essence of the combustion process is the conversion of solid phase decomposition into gas phase oxidation. Combustion is a particularly violent oxidation reaction. Practice shows that combustion is a chain reaction triggered by highly active hydroxyl radicals and hydrogen radicals. The greater the concentration of free radicals, the faster the combustion rate. Fabrics use various fibers. Due to different chemical structures, their combustion properties are also different. The indicator indicating the ease of combustion is the limiting oxygen index, referred to as oxygen index, represented by “LOI”. Its meaning is that after the material is ignited, it is placed in a mixed gas of oxygen and nitrogen to maintain the low oxygen volume fraction necessary to continue burning. Its expression is:
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