采用间接开环聚合法合成了平均分子量为444 ，848的聚乳酸，并对合成工艺作了优化。
The of polylactic acid(PLA) was obtained by ring-opening polymerization and the synthesis conditions to get 444,848 molecular weight were optimized.
采用最优化工艺合成的液体树脂残碳量达到49%。
The remaining carbon of the liquid resin is 49% by adopting best technology.
结果表明：通过优化反应条件，使得在苯溶剂中合成出的聚L-乳酸的粘均分子量可达到232，000。
The result shows the viscosity-average molecular weight of poly(L-lactic acid) attains to 232,000 synthesized by optimizing the reactive conditions.
以合成反应的出水量计算产品的收率，讨论了原料配比和溶剂加量对合成产物收率的影响，优化了合成反应条件。
The effect of ratio of raw materials and solvent amount on the yield of synthetic products were discussed, the reaction conditions were optimized.
以合成反应的出水量计算产品的收率，讨论了原料配比和溶剂加量对合成产物收率的影响，优化了合成反应条件。
The effect of ratio of raw materials and solvent amount on the yield of synthetic products were discussed, the reaction conditions were optimized.
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