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Preparation and Property of Intumescent Halogen-Free Flame Retardant Epoxy Resin

Yan Zhang

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Abstract

Halogen-free flame retardant epoxy resin was prepared by intumescent flame retardant(IFR) composed of ammonium polyphosphate and the novel halogen-free phosphorous flame retardant 1,2,3-tri(5,5-methyl-1,3-dioxaphosphorinanyl-2-oxy)benzene.Influence of IFR on behavior of flame resistance,carbonization and microstructure of EP composites were studied.It was found that when the IFR loading was only 30 wt%,the limited oxygen index value of EP retarded could reach 37.6 %.TG analysis revealed that the amount of char residue increased remarkably from 21.24 % without IFR to 43.08 % at 600 ℃.The results from SEM photos showed that puffy coking char layers were formed by lots of closed bubbles in EP specimen filled with IFR after burning.It was proposed that IFR had good flame retardant effect on EP resin.

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What this paper is about

Halogen-free flame retardant epoxy resin was prepared by intumescent flame retardant(IFR) composed of ammonium polyphosphate and the novel halogen-free phosphorous flame retardant 1,2,3-tri(5,5-methyl-1,3-dioxaphosphorinanyl-2-oxy)benzene.Influence of IFR on behavior of flame resistance,carbonization and microstructure of EP composites were studied.It was found that when the IFR loading was only 30 wt%,the limited oxygen index value of EP retarded could reach 37.6 %.TG analysis revealed that the amount of char residue increased remarkably from 21.24 % without IFR to 43.08 % at 600 ℃.The results from SEM photos showed that puffy coking char layers were formed by lots of closed bubbles in EP specimen filled with IFR after burning.It was proposed that IFR had good flame retardant effect on EP resin.

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Available abstract

Halogen-free flame retardant epoxy resin was prepared by intumescent flame retardant(IFR) composed of ammonium polyphosphate and the novel halogen-free phosphorous flame retardant 1,2,3-tri(5,5-methyl-1,3-dioxaphosphorinanyl-2-oxy)benzene.Influence of IFR on behavior of flame resistance,carbonization and microstructure of EP composites were studied.It was found that when the IFR loading was only 30 wt%,the limited oxygen index value of EP retarded could reach 37.6 %.TG analysis revealed that the amount of char residue increased remarkably from 21.24 % without IFR to 43.08 % at 600 ℃.The results from SEM photos showed that puffy coking char layers were formed by lots of closed bubbles in EP specimen filled with IFR after burning.It was proposed that IFR had good flame retardant effect on EP resin.

Key concepts: Intumescent, Fire retardant, Ammonium polyphosphate, Char, Materials science, Epoxy, Composite material, Charring

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Preparation and Property of Intumescent Halogen-Free Flame Retardant Epoxy Resin — Research Paper | ScholarLens