丙交酯纯化方法的改进

Improvement of Purification Method for Lactide

丙交酯的纯度决定了聚乳酸合成的质量。提供了一种重结晶纯化丙交酯的改进方法,该方法具有快速、经济、产品纯度高的特点。以熔点和熔程测定化合物纯度,并对最终产品进行了红外光谱表征。结果表明,重结晶法混合溶剂乙酸乙酯与乙醇的体积比为1:4,结晶温度为40℃得到高纯度的丙交酯。

Molecular mass of polylactide was determined by the purity of lactide,which is often obtained by the recrystallization method.An improved recrystallization method was presented in the article,which is of higher purity,quickness and economy.Melting point measurement and IR were applied to check the purity of products.The ethyl acetate and ethanol volume ratio of 1：4 was selected as optimal recrystallization solvent and the recrystallization temperature is 40℃ to get high purity lactide.