Synthesis of a novel self-crosslinking flame retardant with phosphorus-containing and its thermal stability and combustion performance of solid epoxy resin

doi:10.19936/j.cnki.2096-8000.20230628.009

Abstract

Abstract: A novel self-crosslinking flame retardant with phosphorus-containing (DPPN) was synthesized via substitution reaction, and its structure was characterized by ¹H-NMR and ³¹P-NMR. The results of self-crosslinking behavior and thermal stability for DPPN showed that DPPN has excellent self-crosslinking ability and thermal stability, which are evaluated by DSC and TGA respectively. The curing behavior, thermal stability, combustion behavior and morphology of char residue of the solid EP with DPPN were thoroughly investigated. It was found that the addition of 10% DPPN not only increased the curing temperature of EP, but also elevated the char residue (800 ℃) of EP from 11.0% for neat EP to 17.1%. Moreover, compared to neat EP, the peak heat release rate pHRR, total heat release THR, peak smoke producerate pSPR and total smoke production TSP of EP/10% DPPN composite were respectively reduced by 53.8%, 42.1%, 32.1%, 25.0%, and 10% DPPN EP has good fire resistance.

Key words: epoxy resin, synthesis, self-crosslinking, flame retardancy mechanism, composites

CLC Number:

TB332

WANG Hengxu, XU Jinjia, LIN Zhiqian, XU Hanlin, LOU Gaobo, DAI Jinfeng, FU Shenyuan. Synthesis of a novel self-crosslinking flame retardant with phosphorus-containing and its thermal stability and combustion performance of solid epoxy resin[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(6): 59-66.

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