The Research On Preparation And Application Of Short Fibriform Crucite Non-Halogen Retardant

Non-halogen composite flame retardant is developing rapidly with the advancing consciousness of protecting enviroment and elevating recognization of retardant. As one of typical non-halogen retardant, Mg(OH)2 shows advantages in retarding flame, eliminating smoke,lower dripping, filling, safety and low cost,ect. It also have good thermal stability, effective ability of forming-carbon and diminishing-acid, resulted in wide use. Mg(OH)2 is becoming one of hot point in research. This paper uses brucite whose main constitent is Mg(OH)2 as non-halogen flame-retardant, and attain high retarding through cooperativity with Al(OH)3. The following are the high light of our research: A new technique preparing non-haloge flame retardant was put forward, which is adopted one step of compounding, super-fine grinding and surface-treating. Jet milling of one step and mircoemulsion are applied. The advantage and the disadvange of two program was analyzed. The retardant synthesized with this technique perform property of high flame-retarding effect, mean particle size, fine dispersal. In the mean time, it can effectively avoid the aggorated phenomenon during surface dealing. With the help of SEM and IR, the material shows average grain size 0.05-3μm, the average size increase with temperature. Non-halogen composite flame-retardant of brucite short fiber compound was applied to PE via blend method and radiation-crosslink technique.The mechanical properties, flame retardancy and the properties of adaptability between the flame retardant and the matrix materials of PE were studied. The effect of the different content of flame retardant ,coupling agent and radiation agents are investigated detailly. The result indicated that the property of retandancy is improved with the increasing of the flame retardant and superfine of partical size. The tensile property was improved and then stable with the increasing content of coupling agent, however, the crupture ratio up and then down. And the tensile strength increase stey by step and electric insulation property is up and then descended with the addition of radiation agents.