采用9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物(DOPO)与甲基丙烯酸-β-羟乙酯反应得到膦化物2-甲基-3-(6-氧代-6H.二苯并[c,e][1,2]氧磷杂己环-6-基)丙酸2.羟乙酯(DOPO-HM),将氢氧化铝(Alu)与DOPO-HM掺杂到丙烯酸树脂(AR)制备丙烯酸树脂阻燃复合材料AR/DOPO-HM/Alu.通过热重分析、极限氧指数(LOI)、扫描电镜、X射线光电子能谱(XPS)对复合材料及炭层进行分析.研究表明,DOPO-HM/Alu体系能协同提高复合材料的热稳定性和LOI,复合材料在空气和氮气中热分解炭层致密.XPS研究阻燃机理揭示DOPO-HM的分解产物聚磷酸催化分解基体成炭过程在Al2O3表面进行,焦磷酸铝的生成证明存在协同阻燃效应.Horowitz-Metzger理论计算复合材料的分解活化能,结果表明A12O3对膦催化复合材料分解成炭过程具有正向助催化作用,协同提高复合材料阻燃效力.
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