中文摘要：

利用丙交酯的开环聚合反应成功地制备了单壁碳纳米管/聚乳酸复合材料,研究了其降解性和热稳定性。通过红外光谱（FTIR）、Raman光谱、热失重分析（TGA）和扫描电子显微镜（SEM）研究,证明乙二醇功能化的单壁碳纳米管能够参与丙交酯的开环聚合反应,并在碳纳米管侧壁成功接枝聚乳酸链,得到的复合材料在碱性溶液中容易降解。差示热分析（DSC）表明,功能化单壁碳纳米管/聚乳酸复合材料的玻璃化转变温度与纯聚乳酸相比有所提高。

英文摘要：

Ring-opening polymerization of L-lactide was successfully used to prepare single-walled carbon nanotube/poly（L-lactide）（SWCNTs/PLA） composites,and its degradability and thermal stability were explored.Fourier transform infrared（FTIR） spectra,Raman spectra,thermogravimetric（TGA） analysis and scanning electron microscopy were used to characterize the products.The results show that ring-opening polymerization takes place between the functionalized SWCNTs and L-lactide,resulting in attachment of poly（L-lactide）（PLA） chains to SWCNTs,and the SWCNTs/PLA composites can be hydrolyzed under alkaline solution.The DSC study suggests that the presence of functionalized SWCNTs can enhance the glass transition temperature（Tg） of the composite campared with pure PLA.