锌系杂多酸离子液体催化合成聚戊二酸乙二醇酯的研究  

Study on synthesis of polyethylene glutarate over zinc-based heteropolyacid ionic liquid

作　　者：王雪健 徐铁军[1] 郭立颖[1] 孙营晰 WANG Xue-jian;XU Tie-jun;GUO Li-ying;SUN Ying-xi(School of Petrochemical Engineering,Shenyang University of Technology,Liaoyang 111003,China)

机构地区：[1]沈阳工业大学石油化工学院,辽宁辽阳111003

出　　处：《现代化工》2024年第2期125-130,共6页Modern Chemical Industry

基　　金：国家自然科学基金项目(22278271)。

摘　　要：制备了4种锌系杂多酸离子液体催化剂,利用FT-IR、UV、TGA及SEM对其进行表征与测试。将4种杂多酸离子液体用于催化戊二酸二甲酯与碳酸乙烯酯反应合成聚戊二酸乙二醇酯,并利用FT-IR、TGA、DSC、CTM、GPC对聚戊二酸乙二醇酯进行测定分析。结果表明,[Bmim]_(6)ZnW_(11)TiO_(39)(H_(2)O)催化剂催化效果最佳,在220℃、4.5 h、戊二酸二甲酯与碳酸乙烯酯的投料摩尔比为1∶1.5、催化剂质量为总投料质量的0.8%的条件下,聚戊二酸乙二醇酯的预聚物收率达到59.27%,选择性达到63.59%。缩聚反应的温度为235℃时聚酯分子质量达到最高,且具有良好的热稳定性能、拉伸性能及可生物降解性能。Four kinds of zinc-based heteropoly acid ionic liquid catalysts are prepared,and characterized by means of FTIR,UV,TGA and SEM.They are employed to catalyze the reaction between dimethyl glutarate and ethylene carbonate to synthesize polyethylene glutarate that is measured and analyzed by means of FTIR,TGA,DSC,CTM and GPC.The results show that[Bmim]_(6)ZnW_(11)TiO_(39)(H_(2)O)catalyst presents the best catalytic effect.The yield of the prepolymer of polyethylene glutarate reaches 59.27%and the selectivity reaches 63.59%over[Bmim]_(6)ZnW_(11)TiO_(39)(H_(2)O)catalyst when the reaction temperature is 220℃,the reaction has performed for 4.5 h,the molar ratio of dimethyl glutarate to ethylene carbonate is 1:1.5,and the dosage of catalyst is 0.8%that of total feed mass.The optimum temperature for the polycondensation reaction is 235℃,the prepared polyethylene glutarate reaches the highest molecular weight,and shows good thermal stability,tensile properties and biodegradability.

关 键 词：杂多酸离子液体 碳酸乙烯酯 戊二酸二甲酯 聚戊二酸乙二醇酯 可生物降解聚酯 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]