Journal
MACROMOLECULAR MATERIALS AND ENGINEERING
Volume 293, Issue 9, Pages 763-770Publisher
WILEY-BLACKWELL
DOI: 10.1002/mame.200800134
Keywords
graft copolymers; mechanical properties; nanocomposites; poly(epsilon-caprolactone); poly(lactic acid); starch nanocrystals
Funding
- Canadian Biomass Innovation Network
- Youth Chenguang Program of Science & Technology in Wuhan [200850731383]
- State Key Laboratory of Polymer Physics and Chemistry
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology [200514, 200716]
- Chinese Academy of Sciences [LCLC-2005-172, LCLC-2008-02]
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Poly(E-caprolactone) (PCL) was grafted to the surface of starch nanocrystals (StN) via microwave-assisted ROP. The resultant nanoparticles were then incorporated into a poly(lactic acid) matrix to produce fully-biodegradable nanocomposites with good mechanical properties. A loading level of 5 wt.-% StN-g-PCL resulted in simultaneous enhancements of strength and elongation. The StN-g-PCL self-aggregated as rubbery microparticles to enhance the elongation by ca. 10-fold over that of neat PLA. Meanwhile, the grafted PCL chains were miscible with PLA and formed a stress-transferring interface to the StN, providing a reinforcing function.
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