Mechanical Properties and Thermal Behavior of Thermoplastic Polyurethane Toughening Polylactide Prepared by Vane Extruder

Abstract:

Vane extruder is a novel equipment in which polymer mainly suffers from elongational deformation. It has the character of short thermal mechanical process so that the biodegradable polymer will less decompose during processing. Different weight ratios of thermoplastic polyurethane (TPU) were blend with polyactide (PLA) in vane extruder. The results show that TPU plays the role of toughening the PLA which is well dispersed in the PLA matrix. From the mechanical properties, for the composite with 40 wt % TPU, the elongation at break of the blend reached 335%. Meanwhile the results observed from DSC curves revealed apparent partial miscibility of the blends and enhanced crystallization ability of PLA due to the influence of elongational flow. From the DMA curves, it could be found that PLA and TPU compatibility of two phases have been improved to some extent because of the elongational deformation.

• Periodical: Applied Mechanics and Materials (Volume 431)
• Pages: 110-115
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.431.110
• Online since: October 2013
• Authors: Jia Jia Chen*, Huan Yu Liu, Gui Zhen Zhang, Jin Ping Qu
• Keywords: Elongational Flow, Mechanical Property, Polyactide, Thermal Behavior, Thermoplastic Polyurethane (TPU), Vane Extruder

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