Red phosphorus thermal decomposition, can react with oxygen in the air around generated oxygen containing phosphoric acid, the oxygen acid absorbent is better, achieve polymer surface dehydration of carbonized form carbonization layer, such not only can isolate polymer, reduce the release of combustible volatile components, also has heat resistance, lower heat oxidation on the surface of the polymer, realize the condensed phase flame retardant.
Pyrolysis products of red phosphorus PO · free radicals after entering the gas phase, can also capture the combustion flame in a large number of h., HO · free radicals, cut off the chain flame oxidation reaction, the purpose of a gas flame retardant.
Red phosphorus in heavy air is easy to absorb moisture, the production of H3PO4, H3PO3, H3PO2 material, make the red phosphorus stick and loss of liquidity, and phosphoric acid are more likely to produce. If red phosphorus is present in the polymer materials products, red phosphorus moisture absorption oxidation, make urban luster after surface corrosion products and the original performance, and gradually to the inner corrosion, at the same time generate oxygen acid corrosion processing equipment.
Red phosphorus and the compatibility of resin is poor, and there will be a settlement of segregation and the resin viscosity rise, to casting, resin impregnation, such as operating difficult, also to cause a decline in the performance of the composite materials.
Red phosphorus and air contact for a long time, not only can make the oxygen of phosphorus acid, also can release poisonous PH3 gas, and the human body is adverse to the environment.
Red phosphorus moisture absorption, instability of plastic products of the harmful effects of physical, especially for weak current components of the impact and the components of high pressure insulation leakage.
The purple red phosphorus itself, can make products color.
Red phosphorus is ignited by the shock, dust dry red phosphorus with combustion and explosion danger.
Red phosphorus flame retardants in the application process is more environmental protection, and excellent flame retardant effect, is a rare flame retardant material.
