Rheology, Microstructure, and Property of Polylactide/Clay Nanocomposites Prepared with SC-CO2 by Melt Compounding

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The rheology, microstructure and mechanical properties of polylactide (PLA)/clay nanocomposites were investigated. The nanocomposites were prepared using a twin screw extruder with and without the aid of supercritical carbon dioxide. Results show that there exists a solid-like behavior in the nanocomposites. TEM results show that the clay is dispersed more homogeneous in the nanocomposites compounded with Sc-CO2. Compared with pure PLA, the elongation at break and tensile strength for nanocomposite compounded with 5 wt% CO2 are improved by 166% and 25%. The impact strength of the nanocomposites exhibits a 32-47% increase.

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Journal: TechConnect Briefs
Volume: 2, Nanotechnology 2009: Life Sciences, Medicine, Diagnostics, Bio Materials and Composites
Published: May 3, 2009
Pages: 542 - 545
Industry sector: Advanced Materials & Manufacturing
Topic: Composite Materials
ISBN: 978-1-4398-1783-4