Synthesis of high molecular weight polylactic acid from aqueous lactic acid co-catalyzed by tin(II)chloride dihydrate and succinic anhydride

作     者：LEI Ziqiang, BAI Yanbin & WANG Shoufeng Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China 

出 版 物：《Science Bulletin》 (科学通报(英文版))

年 卷 期：2005年第20期

页      面：136-138页

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

主　　题：polylactic acid bulk polymerization catalytic polymeri- zation. 

摘      要：Polylactic acid was synthesized from commer- cial available cheap aqueous lactic acid (85%―90% w/w) using succinic anhydride and SnCl2·2H2O as catalyst in the absence of organic solvents. As a result, polylactic acid with a molecular weight of 60000 was prepared in 10 h. The new procedure is much simple, cheap and outstanding in that the start material is aqueous lactic acid; the catalytic system is environmentally benign.