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Flame Retardancy and Burning Property of Novel Flame Retardant Epoxy Resin

Min Zhao

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Abstract

Epoxy resin was flame retarded with the novel arborescent P-Br flame retardant 1,3,5-tri(5,5-dibromomethyl-1,3,-dioxaphosphorinanyl-2-oxy)benzene.The effect of FR content on flame retarding properties such as limited oxygen index(LOI) and UL-94 was studied.The results demonstrated that the FR was effective on the flame retardancy of epoxy resin when the content of the fire retardant was 30 %.It was also found that the EP retarded by FR could still pass UL94 V-0 rating,and its limited oxygen index value could reach 29.4 %.The cone experimental results showed that the av-HRR,av-EHC,av-SEA and av-MLR of the EP retarded lowed 87.5 %,92.8 %,90.8 % and 58.5 % respectively than those of pure EP.In addition,SEM observation revealed that the continuous,intact,strong and closed charred layers were formed in EP specimen filled with FR after burning.

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What this paper is about

Epoxy resin was flame retarded with the novel arborescent P-Br flame retardant 1,3,5-tri(5,5-dibromomethyl-1,3,-dioxaphosphorinanyl-2-oxy)benzene.The effect of FR content on flame retarding properties such as limited oxygen index(LOI) and UL-94 was studied.The results demonstrated that the FR was effective on the flame retardancy of epoxy resin when the content of the fire retardant was 30 %.It was also found that the EP retarded by FR could still pass UL94 V-0 rating,and its limited oxygen index value could reach 29.4 %.The cone experimental results showed that the av-HRR,av-EHC,av-SEA and av-MLR of the EP retarded lowed 87.5 %,92.8 %,90.8 % and 58.5 % respectively than those of pure EP.In addition,SEM observation revealed that the continuous,intact,strong and closed charred layers were formed in EP specimen filled with FR after burning.

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Available abstract

Epoxy resin was flame retarded with the novel arborescent P-Br flame retardant 1,3,5-tri(5,5-dibromomethyl-1,3,-dioxaphosphorinanyl-2-oxy)benzene.The effect of FR content on flame retarding properties such as limited oxygen index(LOI) and UL-94 was studied.The results demonstrated that the FR was effective on the flame retardancy of epoxy resin when the content of the fire retardant was 30 %.It was also found that the EP retarded by FR could still pass UL94 V-0 rating,and its limited oxygen index value could reach 29.4 %.The cone experimental results showed that the av-HRR,av-EHC,av-SEA and av-MLR of the EP retarded lowed 87.5 %,92.8 %,90.8 % and 58.5 % respectively than those of pure EP.In addition,SEM observation revealed that the continuous,intact,strong and closed charred layers were formed in EP specimen filled with FR after burning.

Key concepts: Fire retardant, Epoxy, Materials science, Composite material, Benzene, Oxygen, Limiting oxygen index, Polymer chemistry

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