DOPO改性ATH阻燃环氧树脂性能的研究  

Study on Properties of DOPO Modified ATH Flame Retardant Epoxy Resin

作　　者：严伟[1] 李乾波 杨春林[1] 聂胜强 范鑫 YAN Wei;LI Qian-bo;YANG Chun-lin;NIE Sheng-qiang;FAN Xin(School of Chemistry and Materials,Guiyang University,Guiyang 550005,China;Guizhou Polytechnic of Construction,Guiyang 551400,China)

机构地区：[1]贵阳学院化学与材料工程学院,贵州贵阳550005 [2]贵州省建设职业技术学院,贵州贵阳551400

出　　处：《塑料工业》2018年第8期119-123,107,共6页China Plastics Industry

基　　金：贵州省教育厅重点科技项目(黔教合KY字[2015]400);贵州省科技合作计划(黔科合LH字[2015]7304)

摘　　要：采用9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物(DOPO)改性氢氧化铝(ATH),制备了(DOPO-ATH)阻燃剂,并用以阻燃环氧树脂(EP)。利用傅里叶红外光谱(FTIR)、热失重分析(TGA)、对DOPO-ATH进行了结构表征和热分析。通过锥形量热测试(CCT)、扫描电子显微镜(SEM)、热重红外联用(TG-FTIR)等手段对EP/DOPO-ATH复合材料的阻燃性能及残炭结构进行研究。结果表明,DOPO-ATH的残炭率(700℃)高达68%,具有较好的成炭能力。与纯EP相比,7%DOPO-ATH使EP的热释放速率峰值(pHRR)下降到689.5kW/m^2,相比纯EP的pHRR(1079.2kW/m^2)下降了36%。随DOPO-ATH含量的增加,EP/DOPO-ATH的残炭率逐渐增加,EP/DOPO-ATH燃烧炭层致密,炭层中以含磷和铝的化合物为主,形成了良好的凝聚相阻燃机理,同时DOPO-ATH在气态阶段磷的释放对EP固化物的火焰抑制作用,实现气相阻燃机理。A flame retardant compound DOPO-ATH was prepared by using 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide（ DOPO） modified aluminum hydroxide（ ATH） as a flame retardant.Flame-retardant epoxy resin（ EP） composites combined DOPO-ATH were prepared. Structural characterization and thermal analysis of DOPO-ATH by Fourier transform infrared spectroscopy（ FTIR）,thermogravimetric analysis（ TGA）. The flame-retardant properties and residual carbon structure of EP/DOPO-ATH composites were studied by cone calorimetry test（ CCT）,scanning electron microscopy（ SEM）and thermogravimetric（ TG） analysis coupled with infrared spectroscopy（ TG-FTIR）. The results show that the residual char rate of DOPO-ATH at 700 ℃ is as high as 68%, and it has a good char composition.Compared with pure EP,the peak heat release rate（ p HRR） of EP decreases to 689. 5 k W/m^2 when adding 7% DOPO-ATH. The value of p HRR drops by 36% from pure EP（ 1 079. 2 kW/m^2）. With the increase of DOPO-ATH content,the residual char rate of EP/DOPO-ATH increases gradually,and the EP/DOPO-ATH combustion charcoal layer is dense. The carbon layer mainly contains phosphorus and aluminum compounds,which forms a good condensed phase resistance. Moreover,the phosphorus release of DOPO-ATH inhibits the flame of EP composite in the gaseous phase,which shows that DOPO-ATH exists gas-phase flame retardant mechanism.

关 键 词：环氧树脂 氢氧化铝 9 10-二氢-9-氧杂-10-磷杂菲-10-氧化物改性氢氧化铝 阻燃性能 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业] TQ314.24