NDLI: Processing and MWNT Composition Effects on the Thermal, Electrical and Mechanical Properties of PLA-MWNT Composites

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Reza, R. Rizvi Jae, K. Kim Hani, E. Naguib
Copyright Year	2009
Abstract	This paper investigates the processing and its effects and the effect of multiwall carbon nanotube (MWNT) composition on the thermal, electrical and mechanical properties of polylactide (PLA)-MWNT composites. The composite films were prepared by a solvent casting process using two solvents, chloroform and 1,4-dioxane. The dispersion of the MWNTs in PLA was examined using a scanning electron microscope and was found to be more improved when 1,4-dioxane was used as the solvent as compared to chloroform. The thermal characteristics of the composites were examined on Differential Scanning Calorimetry and Thermo-gravimetric Analysis. Composites prepared using 1,4-dioxane had greater improvements in composite decomposition temperature, glass transition temperature and displayed faster crystallization kinetics. The mechanical properties of the composites were tested in uniaxial tension. Composites prepared using chloroform had a lower modulus than composites prepared using 1,4-dioxane. The electrical AC conductivity of the composites was measured over a broad frequency spectrum. Composites prepared using 1,4-dioxane displayed electrical percolation at 0.5 wt.% MWNT in PLA while percolation was absent in 0.5 wt.% MWNT composites prepared using chloroform.
Starting Page	217
Ending Page	224
Page Count	8
File Format	PDF
ISBN	9780791843871
DOI	10.1115/IMECE2009-11314
e-ISBN	9780791838631
Volume Number	Volume 14: Processing and Engineering Applications of Novel Materials
Conference Proceedings	ASME 2009 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2009-11-13
Publisher Place	Lake Buena Vista, Florida, USA
Access Restriction	Subscribed
Subject Keyword	Differential scanning calorimetry Temperature Multi-walled nanotubes Electrical conductivity Crystallization Mechanical properties Percolation theory Scanning electron microscopes Multi-walled carbon nanotubes Glass transition Casting Composite materials Thermal conductivity Tension
Content Type	Text
Resource Type	Article

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