Effect of Flame Retardant on the Properties of Polyurethane Elastomer
Prepolymer component was synthesized using polyether polyols PPG2000 and N330,diphenylmethane diisocyanate MDI-50 as raw materials,polyol component was prepared using polyols PPG2000 and N330,chain extenders MOCA and EG.The polyurethane elastomers were synthesized through semi prepolymer method by adding flame retardants.The effect of flame retardants on the properties of polyurethane elastomers was studied.The result showed that flame retardants significantly improved the flame retardancy of polyurethane elastomers,but the tensile strength and tear strength were reduced.According to the analysis of a cone calorimeter,the combination of flame retardant modified APP/PER/MA could effectively reduce smoke generation rate,heat release rate and total heat release.The addition of flame retardants reduced the volume resistivity of the material for a certain extent.
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