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用丁二酸酐与SnCl2·2H2O共催化含水乳酸本体缩聚,合成分子量60000的聚乳酸,合成的聚乳酸产率、纯度高,反应时间短;单体为含水10%~15%的乳酸,价格低廉,原料来源丰富;聚合方法环境友好,不使用任何共沸溶剂或有毒催化剂.
Polycondensation of anhydrous lactic acid with succinic anhydride and SnCl2 · 2H2O to synthesize polylactic acid with molecular weight of 60,000, yield of polylactic acid with high purity and short reaction time; the monomer is lactic acid containing 10% -15% of water with low price , Rich sources of raw materials; polymerization method environment-friendly, do not use any azeotropic solvents or toxic catalysts.