中国塑料2017，Vol.31Issue(3)：35-39,5.DOI:10.19491/j.issn.1001-9278.2017.03.007
聚乳酸/聚氨酯共混物的力学行为与形态研究
Mechanical Behaviors and Morphology Evolution of Poly(lactic acid)/ Thermoplastic Polyurethane Blends
摘要
Abstract
A series of poly (lactic acid) (PLA)/thermoplastic polyurethane (TPU) blends were prepared by melt compounding with a twin-screw extruder.A universal testing machine,impact testing machine,dynamic mechanical analyzer (DMA) and scanning electron microscope (SEM) were used to test the tensile property,impact strength,dynamic thermo-mechanical property and morphology of PLA/TPU blends,respectively.The results indicated that the elongation at break,impact strength and loss modulus of PLA/TPU blends increased distinctly with increasing TPU content,and the morphology of fracture surfaces present a change from droplets to thick fibers and thin fibers.Moreover,compared with pure PLA,the elongation at break and impact strength increased by 300 ％ and by a factor of 13.5 for the blend containing 40 wt ％ TPU,respectively.关键词
聚乳酸/热塑性聚氨酯/拉伸速率/力学行为/形态演化Key words
poly(lactic acid)/thermoplastic polyurethane/drawing rate/mechanical behavior/morphology分类
化学化工引用本文复制引用
贾仕奎,王忠,朱艳,陈立贵..聚乳酸/聚氨酯共混物的力学行为与形态研究[J].中国塑料,2017,31(3):35-39,5.基金项目
中国博士后科学基金资助项目(2016M600787) （2016M600787）
陕西省教育厅2015年重点科学研究计划项目(15JS017) （15JS017）
