文中采用含磷阻燃剂二乙基次膦酸铝改性水性聚氨酯,并通过涂层技术提升涤纶织物的阻燃及防熔滴性。主要探究阻燃剂用量与涂层添加量对织物阻燃效果的影响,并研究阻燃涂层织物的燃烧行为、阻燃性、力学性能及耐水压和光泽度。结果表明,...文中采用含磷阻燃剂二乙基次膦酸铝改性水性聚氨酯,并通过涂层技术提升涤纶织物的阻燃及防熔滴性。主要探究阻燃剂用量与涂层添加量对织物阻燃效果的影响,并研究阻燃涂层织物的燃烧行为、阻燃性、力学性能及耐水压和光泽度。结果表明,当二乙基次膦酸铝用量为2%、涂层为100 g/m2时,织物损毁长度降至12.9 cm,极限氧指数提至28.6%,无熔滴,达B1级阻燃标准,可以有效提高聚氨酯涂层涤纶织物的阻燃性能和防熔滴性能;锥形量热测试表明,最大热释放速率和总烟雾量分别降低24.9%和69.3%,同时,阻燃涂层织物保持良好的力学性能,耐静水压值为52.3 k Pa。展开更多
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
A novel preparation of aluminum diethylphosphinate（AlPi） was carried out with free-radical addition reaction by means of UV-irradiation under atmospheric pressure.A solution of sodium hypophosphite was treated with ...A novel preparation of aluminum diethylphosphinate（AlPi） was carried out with free-radical addition reaction by means of UV-irradiation under atmospheric pressure.A solution of sodium hypophosphite was treated with ethylene and irradiated with ultraviolet light in the presence of an amount of photoinitiator effective to initiate the free-radical reaction between the hypophosphite anion and the double bond of the ethylene molecule.The ethylene was micro-bubbled into the reaction mixture with the addition of the photoinitiator,and the gas-liquid contact surface and the photoinitiator concentration in the gas-liquid interface were increased largely.The yield of the final product could be improved to about 96%.The contents of P,Al in samples were detected by ICP,and the molecular structure of the samples was confirmed by ^（31）P NMR,~1H NMR and FTIR spectroscopic analysis.Thermal stability of the final products was investigated in detail by TG-DTA.展开更多
文摘文中采用含磷阻燃剂二乙基次膦酸铝改性水性聚氨酯,并通过涂层技术提升涤纶织物的阻燃及防熔滴性。主要探究阻燃剂用量与涂层添加量对织物阻燃效果的影响,并研究阻燃涂层织物的燃烧行为、阻燃性、力学性能及耐水压和光泽度。结果表明,当二乙基次膦酸铝用量为2%、涂层为100 g/m2时,织物损毁长度降至12.9 cm,极限氧指数提至28.6%,无熔滴,达B1级阻燃标准,可以有效提高聚氨酯涂层涤纶织物的阻燃性能和防熔滴性能;锥形量热测试表明,最大热释放速率和总烟雾量分别降低24.9%和69.3%,同时,阻燃涂层织物保持良好的力学性能,耐静水压值为52.3 k Pa。
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support by Zhenxing Chemistry Co.,Ltd(Tianjin,China)
文摘A novel preparation of aluminum diethylphosphinate（AlPi） was carried out with free-radical addition reaction by means of UV-irradiation under atmospheric pressure.A solution of sodium hypophosphite was treated with ethylene and irradiated with ultraviolet light in the presence of an amount of photoinitiator effective to initiate the free-radical reaction between the hypophosphite anion and the double bond of the ethylene molecule.The ethylene was micro-bubbled into the reaction mixture with the addition of the photoinitiator,and the gas-liquid contact surface and the photoinitiator concentration in the gas-liquid interface were increased largely.The yield of the final product could be improved to about 96%.The contents of P,Al in samples were detected by ICP,and the molecular structure of the samples was confirmed by ^（31）P NMR,~1H NMR and FTIR spectroscopic analysis.Thermal stability of the final products was investigated in detail by TG-DTA.
