生物降解材料聚丙交酯的合成

Synthesis of Biodegradable Polylactide

研究DL 乳酸二聚为DL 丙交酯 (DL LA) ,经开环聚合成PDLLA。探讨了反应温度、真空度、催化剂对DL LA收率的影响 ,聚合温度、时间、催化剂用量与PDLLA平均摩尔质量的关系 ,对它们的结构进行了红外光谱测试。用无水甲醇作DL LA重结晶的溶剂 ,使其熔点达到 12 5～ 12 6℃。DL LA在真空封管下聚合 ,重均摩尔质量 (Mw)大于 10 .0× 10 4g/mol。

s The paper studied the synthesis of DL Lactide(DL LA) and poly DL Lactide(PDLLA). The effect of temperature ,vacuum, catalyst on the yield of DL LA,the relationship between the temperature ,time, catalyst content and average molar mass of PDLLA were discussed. The structure of DL LA,PDLLA were characterized by IR spectra. DL LA was recrystallized from methanol, melting point 125～126 ℃. DL LA polymerized in sealed ampoules, weight average molar mass was above 10×10 4.