制备了离子液体[Bmim]BF4,对其催化乙基双环亚磷酸酯与甲基膦酸二甲酯进行聚合反应合成环状膦酸酯进行了考察。正交实验确定了最佳合成路线。结果表明,乙基双环亚磷酸酯与甲基膦酸二甲酯的摩尔比为1∶1.6,催化剂用量为反应物总质量的0.4%,反应温度185℃,反应时间16 h,产率达98%。热重分析显示,500℃时残炭率为7.37%,具有良好的成炭作用。 The ionic liquid [Bmim] BF4 was prepared and the cyclic phosphonate ester was synthesized through the polymerization of ethyl bicyclohexyl phosphite and methyl methyl phosphonate. Orthogonal experiments determine the best synthetic route. The results showed that the molar ratio of ethyl bicyclo-phosphite to dimethyl methylphosphonate was 1: 1.6, the amount of catalyst was 0.4% of the total mass of the reactants, the reaction temperature was 185 ℃, the reaction time was 16 h and the yield was 98 %. Thermogravimetric analysis showed that the carbon residue rate was 7.37% at 500 ℃ and had good carbon formation.