How to analyze the phosphorus content and decomposition temperature of red phosphorus flame retardant?

2020-03-14 11:42:15

How to analyze the phosphorus content and decomposition temperature of red phosphorus flame retardant?

How to analyze the phosphorus content and decomposition temperature of red phosphorus flame retardant? With the development of synthetic material industry, the improvement of laws and regulations, and the enhancement of people ' The development and modification of flame retardant have become the main trend of flame retardant.

Red phosphorus flame retardant is a better flame retardant, which has the advantages of less addition, high flame retardant efficiency, low smoke, low toxicity and wide use. Red phosphorus is compounded with inorganic flame retardants such as aluminum hydroxide and expansible graphite to make composite non halogen flame retardants such as phosphorus / magnesium, phosphorus / aluminum and phosphorus / graphite. The flame retardant dosage can be greatly reduced, so as to improve the processing performance and physical and mechanical properties of plastic products.

Red phosphorus flame retardant contains 90% phosphorus. Decomposition temperature > 300 ℃. The 600 mesh sieve passes through. The average particle diameter is less than 5 μ M.

Nylon is a thermoplastic resin with repeatable amide group (- nhco -) in the main chain. Nylon is widely used in various fields because of its good mechanical properties, electrical properties, heat resistance, toughness, oil resistance, wear resistance, self lubrication, chemical resistance and other excellent properties.

Flame retardant nylon classification:

1. Halogen free flame retardant nylon.

Halogen free flame retardant nylon, the widely used halogen-free flame retardant in nylon are red phosphorus and melamine salts. The halogen-free flame retardant nylon products have excellent flame retardant performance, and the flame retardant level reaches ul94v. It has the advantages of low precipitation, anti dripping, high electrical performance and heat resistance, high CTI value, good electrical performance, high impact strength, environmental friendliness and environmental protection. Suitable for electrical connector. In order to improve the flame retardancy of the composite, the brominated flame retardant or halogen-free flame retardant which is combined with European ROHS standard is added. Including ul-94v-o test and V-1, V-2 test. The processing temperature of this kind of granular nylon is 500F (260 ℃).

2. Reinforced flame retardant nylon.

Glass fiber reinforced filling series materials are PA materials reinforced with different content of glass fiber and mineral powder, mainly including two series of glass fiber reinforced filling PA6 and glass fiber reinforced filling PA66, with high strength, high rigidity, high heat resistance, good dimensional stability and molding process. It can be molded by injection, molding, extrusion and other methods, widely used in automobile, electrical and other industries.