摘要
采用熔融共混制备了聚乳酸/碳纳米管复合材料(PLA/CNTs)。利用透射电镜(TEM)、差示扫描量热仪(DSC)和热重分析仪(TGA)对复合体系的形态、冷结晶行为以及热稳定性进行了研究。结果表明,羧基化的碳纳米管均匀分散于聚乳酸基体中形成了纳米复合材料;PLA/CNTs复合体系不从熔体冷却结晶,但可以在较慢的升温过程中固态下冷结晶,CNTs的存在一定程度上阻碍了PLA基体的冷结晶;此外,复合体系的热稳定性与纯聚乳酸相比有所提高。
Polylactide/multi-walled carbon nanotube composites （PLA/CNTs） were prepared by melt mixing. The morphology, cold crystallization and thermal stability of the composites were investigated respectively by the transmission electron microscope （TEM）, differential scanning calorimeter （DSC）, thermogramitric analysis （TGA）. The results show that the carboxyl CNTs present nice dispersion in the PLA matrix, forming nanocomposites. Both the neat PLA and its composites can not crystallize during cooling process from melt state, while can crystallize in solid state in heating process. However, the presence of CNTs more or less holds the cold crystallization process of PLA matrix. In addition, the thermal stability of composites increases in contrast to that of neat PLA.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2009年第6期85-87,共3页
Polymer Materials Science & Engineering
基金
江苏省青年科技创新人才启动项目(BK2007559)
江苏省教育厅重点项目(06KJA15011)
关键词
聚乳酸
多壁碳纳米管
复合材料
冷结晶
热稳定性
polylactide
carbon nanotubes
composites
cold crystallization
thermal stability
