端羟基聚乳酸的合成与表征

Synthesis and Characterization of Hydroxyl-terminated Poly(lactic acid)

摘要: 采用共沸除水与醇酸缩合反应相结合的方法合成端羟基聚乳酸。通过L9(3^4)正交实验对合成工艺进行了研究，分析了抗氧剂TPP对反应的影响，并用^1H-NMR和DSC对产物结构进行表征。结果表明，产物主要为聚乳酸-1，4-丁二醇(PIA-1，4-BD)。和分子量相同的聚乳酸-1，4-丁二醇．聚乳酸(PLA-1，4-BD-PLA)比较，PLA-1，4-BD具有较高的Tg。

Abstract: Hydroxyl-terminated polylactic acid has been synthesized in an acid-alcohol condensation reaction with eliminating the water by co-boiling. The reaction was studied through pre-designed orthogonal table L_9 (3~4). The effect of antioxidant TPP was discuss