聚羰基脲低聚物的绿色合成研究  

Environmental friendly and economical synthesis of poly(carbonyl urea)oligomer

作　　者：陈建超[1,2] 刘亚青[1,2] 刘俊杰[1,2] 孙付宇[1,2] 赵贵哲[1,2] 朱福田[1,2] 

机构地区：[1]中北大学山西省高分子复合材料工程技术研究中心,山西太原030051 [2]中北大学材料科学与工程学院,山西太原030051

出　　处：《现代化工》2011年第6期55-57,59,共4页Modern Chemical Industry

摘　　要：在充入CO2的高压釜中,以尿素和碳酸二甲酯为原料通过酯的氨解反应合成了聚羰基脲低聚物,产率最高达88.32%,副产物甲醇可以与CO2利用已有技术再转化为碳酸二甲酯,因而本工艺原料利用率高、成本较低。目标产物通过13C-NMR、傅里叶变换红外光谱仪(FT-IR)、元素分析确定是平均聚合度为5的聚羰基脲。探究了CO2通入压力、反应温度、反应时间对产率的影响并初步探讨了CO2的作用机理。Poly （ carbonyl urea） oligomer is prepared by the ammonolysis reaction of urea and DMC （ dimethyl carbonate） in autoclave with carbon dioxide filled. The highest product yield can reach 88.32% under the reaction conditions mentioned above. The only byproduct methanol can react with carbon dioxide directly to produce dimethylcarbonate. Therefore ,the reaction process is high atom economy and low in product cost. The average degree of the polymerization is confirmed 5 by^13 C-NMR, FT-IR and elemental analysis. The influence of carbon dioxide pressure, temperature and reaction time on the yields is investigated. The function mechanism of carbon dioxide is studied as well.

关 键 词：聚羰基脲低聚物 绿色合成 尿素 碳酸二甲酯 

分 类 号：TQ441[化学工程—化学肥料工业]