合成了一种新型阻燃剂六-(N-羟乙基氨基-DOPO-次甲基-苯氧基)-环三磷腈(HEACTP-DOPO),利用傅里叶变换红外光谱(FT-IR)、核磁共振波谱(1H-NMR、31P-NMR)和高分辨质谱(HRMS)确定了其结构,并将HEACTP-DOPO和二乙基次膦酸铝(ADP)复配用于环...合成了一种新型阻燃剂六-(N-羟乙基氨基-DOPO-次甲基-苯氧基)-环三磷腈(HEACTP-DOPO),利用傅里叶变换红外光谱(FT-IR)、核磁共振波谱(1H-NMR、31P-NMR)和高分辨质谱(HRMS)确定了其结构,并将HEACTP-DOPO和二乙基次膦酸铝(ADP)复配用于环氧树脂DGEBA阻燃研究。采用极限氧指数(LOI)和垂直燃烧(UL-94)、热重分析(TGA)和锥形量热(Cone)研究了材料的热降解行为和阻燃性能。当100 g DGEBA中添加10 g HEACTP-DOPO和3 g ADP时,所得阻燃材料的LOI值为37.0%,垂直燃烧通过UL-94V-0级;TGA分析表明,阻燃材料能降低环氧树脂的初始降解温度,增加了高温时的残炭量;Cone数据计算发现,该阻燃材料与纯环氧树脂相比,热释放速率峰值(PHRR)、总热释放(THR)、平均有效燃烧热(Av-EHC)和烟释放总量(TSP)分别降低了39.9%,42.6%,57.6%和7.5%。扫描电镜(SEM)和Mapping结果表明,阻燃材料燃烧后,大量N,P和Al元素分布在致密炭层中,起到了良好的凝聚相阻燃作用。展开更多
The effect of acid component including various conventional acids and tungstic compounds on glucose hydrogenation over a series of binary catalyst system containing Ru/C catalyst was investigated. The results showed t...The effect of acid component including various conventional acids and tungstic compounds on glucose hydrogenation over a series of binary catalyst system containing Ru/C catalyst was investigated. The results showed that HC1, H2SO4, H3BO3, H3PO4, and HNO3 had negligible effect, while all the tungstic compounds imposed inhibiting effects on the hydrogenation of glucose over Ru/C catalyst, and the suppressing effect followed the order of H2WO4〉HPW〉WO3〉AMT〉HSiW. This order is the same as the order of ethylene glycol （EG） yields in the one-pot conversion of glucose to EG, suggesting the important role of competition between glucose hydrogenation and retro-aldol condensation in controlling the selectivity of EG.展开更多
文摘合成了一种新型阻燃剂六-(N-羟乙基氨基-DOPO-次甲基-苯氧基)-环三磷腈(HEACTP-DOPO),利用傅里叶变换红外光谱(FT-IR)、核磁共振波谱(1H-NMR、31P-NMR)和高分辨质谱(HRMS)确定了其结构,并将HEACTP-DOPO和二乙基次膦酸铝(ADP)复配用于环氧树脂DGEBA阻燃研究。采用极限氧指数(LOI)和垂直燃烧(UL-94)、热重分析(TGA)和锥形量热(Cone)研究了材料的热降解行为和阻燃性能。当100 g DGEBA中添加10 g HEACTP-DOPO和3 g ADP时,所得阻燃材料的LOI值为37.0%,垂直燃烧通过UL-94V-0级;TGA分析表明,阻燃材料能降低环氧树脂的初始降解温度,增加了高温时的残炭量;Cone数据计算发现,该阻燃材料与纯环氧树脂相比,热释放速率峰值(PHRR)、总热释放(THR)、平均有效燃烧热(Av-EHC)和烟释放总量(TSP)分别降低了39.9%,42.6%,57.6%和7.5%。扫描电镜(SEM)和Mapping结果表明,阻燃材料燃烧后,大量N,P和Al元素分布在致密炭层中,起到了良好的凝聚相阻燃作用。
基金supported by the National Natural Science Foundation of China(Grants 21176235 and 21206159)
文摘The effect of acid component including various conventional acids and tungstic compounds on glucose hydrogenation over a series of binary catalyst system containing Ru/C catalyst was investigated. The results showed that HC1, H2SO4, H3BO3, H3PO4, and HNO3 had negligible effect, while all the tungstic compounds imposed inhibiting effects on the hydrogenation of glucose over Ru/C catalyst, and the suppressing effect followed the order of H2WO4〉HPW〉WO3〉AMT〉HSiW. This order is the same as the order of ethylene glycol （EG） yields in the one-pot conversion of glucose to EG, suggesting the important role of competition between glucose hydrogenation and retro-aldol condensation in controlling the selectivity of EG.
