N-(2-羟乙基)-2-噁唑烷酮的合成及应用

Synthesis and Application of N-(2-Hydroxyethyl)-2-Oxazolidone

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-噁唑烷酮;用SPSS软件处理实验数据,确定了合成N-(2-羟乙基)-2-噁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,催化剂甲醇钠的质量占二乙醇胺质量的0.50%,反应温度60℃,反应时间60 min;在该条件下,N-(2-羟乙基)-2-噁唑烷酮收率达98.2%。以N-(2-羟乙基)-2-噁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。

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 obtained 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; under such conditions,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 results show that BEBA improves the room temperature and high temperature mechanical performance of the propellant,with 15% above the design requirements of the engine,that the high temperature adhesion index is 1. 02,and that its comprehensive performance is better than the results of LAB-303 B,BAG- 5 and BA603.