碳酸乙烯酯与丁二酸二甲酯耦合反应制备聚丁二酸乙二醇酯预聚体的热力学分析  

Thermodynamic analysis of coupling reaction of ethylene carbonate and dimethyl succinate to poly(ethylene glycol succinate) oligomers

作　　者：王丽苹[1] 

机构地区：[1]曲靖师范学院化学化工学院,云南曲靖655011

出　　处：《天然气化工—C1化学与化工》2015年第1期56-59,共4页Natural Gas Chemical Industry

摘　　要：采用基团贡献法在433K^533K温度范围对碳酸乙烯酯与丁二酸二甲酯耦合制聚丁二酸乙二醇酯反应体系的4个可能的反应进行了反应焓变、反应熵变、反应吉布斯自由能变(ΔrGθ)及平衡常数(Kp)的计算。结果表明,反应(2)和(4)为放热反应,其ΔrGθ<0可自发进行,升高温度不利于反应的进行,而反应(1)和(3)为吸热反应,其ΔrGθ>0,反应不能自发进行。与反应(3)相比,反应(2)的平衡常数较大,反应更易进行。The reaction enthalpy change, reaction entropy change, Gibbs free energy change（ΔrGθ） and equilibrium constants（Kp）of the four possible reactions for coupling of ethylene carbonate and dimethyl succinate to poly（ethylene glycol succinate） oligomers in the temperature range of 433 to 533 K were calculated by using the group contribution method. Results showed that for reaction（2）and（4）, they were exothermic, and their ΔrGθwere less than zero, so both of the reactions were spontaneous and high temperature was unfavorable. However, for reaction（1） and（3）, they were endothermic, and their ΔrGθwere greater than zero, so both of the reactions were not spontaneous. The Kp for reaction（2） was greater than that for reaction（3）, which indicated that the reaction（2）could be carried out more easily.

关 键 词：碳酸乙烯酯 丁二酸二甲酯 聚丁二酸乙二醇酯预聚体 合成 热力学分析 基团贡献法 

分 类 号：TQ013.1[化学工程]