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Structure and Mechanical Properties of Poly(lactic acid) Filled with (Starch nanocrystal)-graft-poly(ε-caprolactone)

✍ Scribed by Jiahui Yu; Fujin Ai; Alain Dufresne; Shanjun Gao; Jin Huang; Peter R. Chang

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
597 KB
Volume
293
Category
Article
ISSN
1438-7492

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✦ Synopsis

Abstract

Poly(ε‐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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