增塑剂对聚乳酸/热塑性淀粉共混物结构与性能的影响  

Effect of Plasticizers on Structure and Property of Polylactic Acid/Thermoplastic Starch Blends

作　　者：张清松[1] 邓晶晶[1] 贺湘伟[1] 吴智华[1] 

机构地区：[1]四川大学高分子科学与工程学院,四川成都610065

出　　处：《塑料工业》2009年第11期51-54,共4页China Plastics Industry

摘　　要：采用柠檬酸三丁酯(TBC)、聚乙二醇(PEG)增塑聚乳酸(PLA)/热塑性淀粉(TPS)共混体系,调节PLA的流变性能,改善PLA与TPS相容性、熔融共混特性和共混物的微观结构和力学性能。结果表明:TBC的改性效果比PEG更佳;TBC能增加TPS分散均匀性,相分散尺寸明显变小;TBC改性PLA/TPS的拉伸强度和断裂伸长率明显提高,吸水率较小。Two plasticizers, tributyl citrate （TBC） and polyethylene glycol （ PEG）, were employed to plasticize poly （ lactic acid） （PLA） blend/thermoplastic starch （ TPS）, regulated the rheological properties, improved the compatibility of PLA and TPS, melt blending properties, microstructure and mechanical properties. The results indicated that： the modification effectiveness of TBC was remarkabler than that of PEG; TBC could increase better TBC dispersion, and the disperse size phase became smaller; The tensile strength and the elongation at break of the PLA/TPS blend modified by TBC improved obviously, but the water absorp- tion was smaller.

关 键 词：聚乳酸 热塑性淀粉 增塑剂 柠檬酸三丁酯 聚乙二醇 结构 性能 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]