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.
Polylactic acid was synthesized from commercial 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.
关键词
聚合物
催化剂
有机溶剂
分子结构
乳酸
polylactic acid, bulk polymerization, catalytic polymerization.
