Synthesis of a Novel?Flame Retardant?Containing Phosphorus, Nitrogen, and Silicon and Its Application in?Epoxy?Resin

编号 020028901

推送时间 20210503

研究领域 林产化工 

年份 2021 

类型 期刊 

语种 英语

标题 Synthesis of a Novel?Flame Retardant?Containing Phosphorus, Nitrogen, and Silicon and Its Application in?Epoxy?Resin

来源期刊 ACS OMEGA

期 第289期

发表时间 20210301

关键词 Flame Retardant;  Epoxy Resin;  thermal stability;  mechanical properties; 

摘要 A novel?flame retardant?(TDA) containing phosphorus, nitrogen, and silicon was synthesized successfully via a controllable ring-opening addition reaction between 1,3,5-triglycidyl isocyanurate, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, and 3-aminopropyltriethoxysilane, and TDA was then blended with diglycidyl ether of bisphenol A to prepare?flame-retardant?epoxy?resins?(EPs). The chemical structure and components of TDA were confirmed by Fourier transform infrared (FTIR) spectra, P-31 nuclear magnetic resonance, and X-ray photoelectron spectroscopy. Thermogravimetric analysis results indicated that after the introduction of TDA, cured EP maintained good?thermal stability?with a minimum initial decomposition temperature of 337.6 degrees C, and the char yields of a EP/TDA-5 sample significantly increased by 76.2% compared with that of the neat EP thermoset. Additionally, with the addition of 25.0 wt % TDA (1.05 wt % phosphorus loading), the limited oxygen index value of cured EP increased from 22.5% of pure EP to 33.4%, and vertical burning V-0 rating was easily achieved. Meanwhile, after the incorporation of TDA, the total heat release and total smoke production of the EP/TDA-5 sample obviously reduced by 28.9 and 27.7% in the cone calorimeter test, respectively.?Flame-retardant?performances and?flame-retardant?mechanisms were further analyzed by scanning electron microscopy, FTIR, energy-dispersive spectrometry, and pyrolysis gas chromatography/mass spectrometry. The results reveal that the synergistic effect of phosphorus, nitrogen, and silicon plays an excellent?flame-retardant?role in both gaseous and condensed phases. In addition, the mechanical and dynamic?mechanical properties?of cured EP thermosets are well maintained rather than destroyed. All the results demonstrate that TDA endows?epoxy?resin?with excellent flame retardancy and possesses great promise in the industrial field.

服务人员 尚玮姣

服务院士 宋湛谦

PDF文件 浏览全文