N-(2-羟乙基)-2-恶唑烷酮的合成及应用

Synthesis and Application of N- (2- hydroxyethyl) -2- oxazolidone

摘要:

通过均匀设计实验，二乙醇胺与碳酸二甲酯反应合成了硼酸酯键合剂中间体N-(2-羟乙基)-2-恶唑烷酮；用SPSS软件处理实验数据，确定了合成N-(2-羟乙基)-2-恶唑烷酮收率与各反应因素的回归方程。得到其最优反应条件为碳酸二甲酯与二乙醇胺摩尔比：1.3:1，催化剂甲醇钠占二乙醇胺质量分数的0.50%，反应温度60℃，反应时间60min；在此条件下，N-(2-羟乙基)-2-恶唑烷酮收率达98.2%。以N-(2-羟乙基)-2-恶唑烷酮和二乙醇胺共混合成的硼酸酯键合剂（BEBA）以相同的工艺和配方应用于5 L丁羟四组元推进剂装药实验，结果显示：推进剂常温、高温各项力学性能指标均高于发动机设计要求15％，高温黏附指数φ为1.02，其综合力学性能优于醇胺类键合剂LAB-303B、二乙醇胺硼酸酯键合剂BAG-5及海因三嗪类键合剂BA603。

Abstract:

As the intermediate of the borate ester bonding agent，N- (2- hydroxyethyl) -2- oxazolidone was synthesized from dimethyl carbonate and diethanolamine by the uniform design．The regression equation of the yield of N- (2- hydroxyethyl) -2- oxazolidone and reaction conditions were gained with the aid of SPSS software．The optimum reaction conditions were that n(dimethyl carbonate)：n(diethanolamine) equaled 1.3，m(Sodium methoxide)/m(diethanolamine) equaled 0.50 ％，reaction temperature 60 ℃and reaction time 60 minute，the yield of N- (2- hydroxyethyl) -2- oxazolidone reached 98.2 ％．Application of the borate ester bonding agent（BEBA），which was synthesized with the mixture of N- (2- hydroxyethyl) -2- oxazolidone and diethanolamine as the raw material，in 5 L four groups hydroxyl terminated polybutadiene propellant was investigated，and the result show that BEBA improves the room temperature and high temperature mechanical performance of the propellant by 15 % above the design requirements of the engine，the high temperature adhesion index is 1.02，and its comprehensive performance is better than the results of LAB-303B，BAG-5 and BA603．