XU Guorong1,2, LIU Jianhua1, SONG Dayong1,2, CHEN Jing1*, XIA Chungu1
(1. State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 730000, China; 2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China)
Abstract: Employing SO3H-functionalized ionic liquids as catalysts, the biodegradable poly[3- -hydroxypropionic acid](PHP) was obtained by ester exchange polymerization of 3-Hydroxyl propionic 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 FTIR, NMR and TG-DSC were applied to characterize the products. The PHP with Mw above 1.0X104 and yield above 82% could be obtained when catalyzed by [BsMIm][OTf] under the optimal reaction conditions. In addition, the catalyst in the polymer could be removed completely after washing with water, efficiently avoiding the pollution of the product.
Key words: SO3H-functionalized ionic liquids; 3-hydroxyl propionic acid methyl ester; Poly[3-hydroxypropionic acid]; Ester exchange
E-mail: yaya436@163.com
Journal of Molecular Catalysis, Vol. 26, Issue 4, 2012,293-299
