磺酸功能化离子液体催化3-羟基丙酸甲酯酯交换聚合反应  

Ester Exchange Polymerization of 3-Hydroxyl Propionic Acid Methyl Ester Catalyzed by SO_3 H-functionalized Ionic Liquids

作　　者：徐国荣[1,2] 刘建华[1] 宋大勇[1,2] 陈静[1] 夏春谷[1] 

机构地区：[1]中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃兰州730000 [2]中国科学院研究生院,北京100049

出　　处：《分子催化》2012年第4期293-299,共7页Journal of Molecular Catalysis(China)

摘　　要：以磺酸功能化咪唑离子液体为催化剂,以3-羟基丙酸甲酯为原料,采用自身酯交换法合成了具有生物可降解性能的聚羟基脂肪酸酯.系统考察了离子液体种类、反应温度以及聚合反应时间对反应性能的影响,同时采用红外、核磁、热分析等手段对产物进行表征.研究结果表明:阴离子为CF3SO-3的磺酸功能化离子液体在120℃的低温下催化聚合反应所得聚酯Mw可达10 159,收率82.1%;通过水洗方法可有效去除产物中的离子液体催化剂,从而避免催化剂污染产物.Employing SO3 H-functionalized ionic liquids as catalysts, the biodegradable poly [ 3-hydroxypropionic acid] （PHP） was obtained by ester exchange polymerization of 3-Hydroxyl propionie acid methyl ester（3-HPM）. The effects of various ionic liquids, reaction temperature and reaction time on the polymerization performance were discussed in detail. Meanwhile, the FFIR, NMR and TG-DSC were applied to characterize the products. The PHP with Mw above 1.0×104 and yield above 82% could be obtained when catalyzed by [ BsMIm] [ OTf] under the opti- mal reaction conditions. In addition, the catalyst in the polymer could be removed completely after washing with water, efficiently avoiding the pollution of the product.

关 键 词：磺酸功能化离子液体 3-羟基丙酸甲酯 聚3-羟基丙酸酯 酯交换聚合 

分 类 号：O631.5[理学—高分子化学] TQ316.33[理学—化学]