Improved flame retardancy of epoxy resin composites modified with a low additive content of silica-microencapsulated phosphazene flame retardant

Lijie Qu, Yanlong Sui, Chunling Zhang*, Xueyan Dai, Peihong Li, Guoen Sun, Baosheng Xu, Daining Fang

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

55 引用 (Scopus)

摘要

Epoxy resin (EP) composites with improved flame retardancy were fabricated. To solve the problem of the large addition of phosphazene flame retardants, we designed a system based on phosphorus–nitrogen–silicon synergistic flame-retardant Si(H) microcapsules with silica as the shell and hexaphenoxycyclotriphosphazene as the core. Si(H)/EP composites were manufactured with two coupling agents to promote interactions. In cone calorimetric tests, heat and gas releases of Si(H)/EP composites were reduced, and fire hazard was minimized. Residual analysis indicated the strong rigidity and mechanical robustness. The mechanism included phosphorus quenching effect and nitrogenous diluting effect of flame inhibition effect in gas phase, and phosphorus charring effect and silicic barrier and protective effect in solid phase. This research provides an effective flame-retardant method for EP composites with a low additive content.

源语言英语
文章编号104485
期刊Reactive and Functional Polymers
148
DOI
出版状态已出版 - 3月 2020

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