完全降解聚乳酸共混增韧的研究进展

Toughening Research Progress in Completely Biodegradable Polylactide by Blending

聚乳酸(PLA)是一种具有良好生物降解性和生物相容性热塑性脂肪族聚酯,但PLA的性能较脆,冲击强度较差,很大程度上限制了其广泛应用,因此需要通过改性来提高其性能和扩大其应用范围。选择完全降解的第二组分来共混增韧PLA,继而形成对环境友好的共混物,综述了近年来淀粉、植物纤维等天然高分子和PCL、PBAT等合成高分子增韧PLA的研究进展。

Polylactic acid （PLA） is a kind of thermoplastic aliphatic polyester with excellent biodegradability and biocompatibility. However,its application is largely limite as a result of native defects, such as brittleness, poor impact strength. Thus ,it is necessary to modify its performance then expand its scope of application. The completely degradable second component is chosen to toughen PLA by blending so that an friendly blends for environment is formed. It is reviewed the research progress of toughening PLA by natural polymer （starch, plant fiber,etc） and synthetic polymer（PCL,PBAT,etc）.