合成了丙烯酸(10-氧-10-氢-9-氧杂-10-磷杂菲-10-基)甲酯(DOPO-CH2O-AA)单体,并通过FT-IR、1 H-NMR确认其结构.将DOPO-CH2O-AA和3-甲基丙烯酰氧基丙基三甲氧基硅(KH-570)作为阻燃单元、苯乙烯作为增容单元通过自由基本体聚合制备了聚合型磷-硅阻燃剂(PFR).并研究了DOPO-CH2O-AA和KH-570共聚比例对PFR的热稳定性和分解成炭能力的影响,确定了最佳的单体比例为n(DOPO-CH2O-AA)/n(KH-570)=6/4.将20％～30％(质量分数)的PFR用于聚苯乙烯阻燃改性,燃烧与热重分析结果符合凝聚相阻燃的特点.其中,当使用30％共聚组成为n(DOPO-CH2O-AA)/n(KH-570)/n (St)=48/32/20的阻燃剂阻燃聚苯乙烯时,极限氧指数(LOI)为26.8％,无缺口冲击强度为0.92 kJ/m2;热重分析显示,阻燃后聚苯乙烯的起始分解温度在350～360℃,热分解后600℃残炭量高于20％.研究结果表明,PFR中磷-硅元素之间有明显的凝聚相协同阻燃作用.
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