Journal
MATERIALS LETTERS
Volume 192, Issue -, Pages 17-20Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2017.01.063
Keywords
Biomaterials; Interfaces; Microstructure; Poly(lactide); Super-tough; Reactive blending
Funding
- Shandong Province Natural Science Foundation of China [2016ZRBM17]
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Poly(lactide) (PLA)/poly(butylene-adipate-co-terephtalate) (PBAT) blends containing varying amounts of ethylene-methyl acrylate-glycidyl methacrylate copolymer (EMA-GMA) are prepared through reactive melt-blending to improve toughness. A super-tough PLA/PBAT/EMA-GMA multicomponent blend (75 wt%:10 wt%:15 wt%) exhibits a significantly improved notched impact strength of 61.9 +/- 2.7 kJ/m(2), nearly 13 times higher than those of PLA/10 wt%PBAT binary blend, respectively. A special core-shell like dispersed phase microstructure involving PBAT particles and EMA-GMA phase at the dryofractured surface of the PLA blends is observed by Scanning Electron Microscopy (SEM). The strong interfacial adhesion and enormous shear-yielding deformation of the PLA matrix with the dispersed phases are responsible for the super-toughened effect exhibited by the PLA/PBAT/EMA-GMA blends. (C) 2017 Elsevier B.V. All rights reserved.
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