PBAT及增容剂含量对PLA/PBAT共混物结构和性能的影响  

Effects of contents of PBAT and compatibilizer on microstructure and properties of PLA/PBAT blends

作　　者：邬昊杰 赵佳旭[1] 吴智华[1] 

机构地区：[1]四川大学高分子科学与工程学院,四川省成都市610065

出　　处：《合成树脂及塑料》2015年第2期5-9,18,共6页China Synthetic Resin and Plastics

基　　金：广东省2012年重大科技项目(2012A0801050021)

摘　　要：通过拉伸试验、扫描电子显微镜和差示扫描量热法分析,研究了聚己二酸-对苯二甲酸丁二酯(PBAT)用量对聚乳酸(PLA)/PBAT共混物拉伸性能、微观结构和热性能的影响。结果表明:PBAT能显著改善PLA韧性,增韧效果与PBAT相尺寸及两相间相互作用有关。当m(PLA)∶m(PBAT)=80∶20时,PLA/PBAT共混物的断裂拉伸应变提高约8倍。自制接枝共聚物增容剂能显著改善PLA与PBAT的相容性,提高两相间的相互作用。接枝共聚物增容剂最佳用量为6phr时,共混物断裂拉伸应变提高1倍多。The effect of the content of polybutylene adipate terephthalate（PBAT）on the microstructure,thermal properties and tensile properties of polylactic acid（PLA）/ PBAT blends were studied by tensile tests,scanning electron microscope（SEM）and differential scanning calorimetry（DSC）. The results indicate that the toughness of PLA can be improved dramatically by PBAT and the toughening effect is determined by the size of PBAT domain and the interaction between PLA and PBAT. The tensile strain at break of the blends is increased by about eight times when the mass ratio of PLA to PBAT is 80∶20. Self-made grafted compatibilizer can improve the compatibility and interaction between PLA and PBAT remarkably. The tensile strain at break of the blends is about doubled with the optimal content of the grafted compatibilizer of 6 phr.

关 键 词：聚乳酸 聚己二酸-对苯二甲酸丁二醇酯 增容剂 增韧 

分 类 号：O633.14[理学—高分子化学]