【摘要】 以5-羟甲基糠醛、糠胺、三氯氧磷和9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物（DOPO）为原料合成了一种呋喃基磷杂菲阻燃剂（Furan-2DOPO）,并利用傅里叶变换红外光谱（FTIR）、核磁共振波谱(¹H NMR和³¹P NMR)对其结构进行了表征.进一步利用Furan-2DOPO对环氧树脂进行阻燃改性,得到一系列阻燃环氧固化物.考察了Furan-2DOPO的用量对阻燃环氧固化物的力学性能、热稳定性以及阻燃性能的影响.研究结果表明,当Furan-2DOPO的添加量（质量分数）仅为5%时（磷质量分数为0.47%）,环氧固化物的氧指数达到31.0%,且能够通过UL-94垂直燃烧V-0级测试.与未改性环氧树脂相比,添加2.5%和5%Furan-2DOPO的环氧固化物的最大热释放速率分别下降了31%和35%.此外,2种添加Furan-2DOPO的环氧固化物的拉伸强度均比未改性环氧树脂提升了约28%.炭层分析结果表明,Furan-2DOPO具有良好的催化成炭性能,有利于减少燃烧过程中可燃性气体的逸出,从而提升阻燃性能.更多还原

【Abstract】 A novel bio-based flame retardant(Furan-2DOPO) was synthesized from 5-hydroxymethylfurfural,furfuramine,phosphorus oxychloride and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide(DOPO).Its structure was characterized by Fourier transform infrared spectroscopy,proton-and phosphorus-nuclear magnetic resonance spectroscopy.A series of cured flame retarded epoxy products was obtained by modification of epoxy resin with Furan-2DOPO.The effects of the loading of Furan-2DOPO on the mechanical properties,thermal stability and flame retardant properties of the cured epoxy products were investigated.The results showed that when the addition amount of Furan-2DOPO was only 5%(mass fraction,phosphorus mass fraction was 0.47%),the oxygen index of the cured epoxy product reached 31.0%,and can pass the UL-94 V-0 test;compared with the unmodified epoxy resin,the peak heat release rate of the cured epoxy products containing 2.5%(mass fraction) and 5%(mass fraction) Furan-2DOPO was decreased by 31%and 35%,respectively.In addition,the tensile strength of the cured epoxy products containing 2.5%and 5%Furan-2DOPO was about 28%higher than that of the unmodified epoxy resin,respectively.The results of char analysis indicated that Furan-2DOPO possessed excellent catalytic charring performance,which was conducive to reducing the escape of combustible gases during combustion,so as to improve the flame retardant performance.更多还原