Journal
POLYMERS FOR ADVANCED TECHNOLOGIES
Volume 23, Issue 4, Pages 783-790Publisher
WILEY
DOI: 10.1002/pat.1959
Keywords
PLLA; EVA; FMWCNTs; microstructure; mechanical properties
Categories
Funding
- National Natural Science Foundation of China [50973090]
- Program for New Century Excellent Talents in University [NCET-08-0823]
- Sichuan Youthful Science and Technology Foundation (P.R. China) [07ZQ026-003]
- State Key Laboratory of Polymer Materials Engineering (Sichuan University) [KF201002]
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Toughening of poly( L-lactide) (PLLA) by elastomer attracts much attention in recent years; however, it is usually associated with the deterioration of modulus and/or strength, resulting in limitation in many applications of the material. In this work, functionalized multiwalled carbon nanotubes (FMWCNTs) were introduced into ethylene-co-vinyl acetate toughened PLLA blends. The effects of FMWCNTs content on crystalline structure of PLLA matrix and the morphology of the blends, as well as the selective distribution of FMWCNTs in the ternary nanocomposites were investigated using differential scanning calorimetry (DSC), wide angle X-ray diffraction, scanning electron microscope, and transmission electron microscope. The results show that FMWCNTs exhibit excellent nucleation role in improving the cold crystallization behaviors of PLLA during the annealing and/or DSC heating processes. The results of mechanical property measurements demonstrate that the modulus, strength, and ductility of the blends can be further improved simultaneously through introducing FMWCNTs. Copyright (C) 2011 John Wiley & Sons, Ltd.
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