Effect of Annealing on the Mechanical and Electrical Behavior of Polyurethane/Multi-Walled Carbon Nanotube Nanocomposites

Abstract:

The objective of this research is to investigate the effect of the annealing process on the mechanical and electrical properties of thermoplastic polyurethane/multi-walled carbon nanotube (TPU/MWCNT) nanocomposites. The TPU/MWCNT nanocomposites were prepared by melt-mixing the TPU with 1, 3, and 5 wt.% MWCNT. The TPU/MWCNT injection-molded specimens were annealed at 110°C at different annealing time intervals. The mechanical properties of TPU/MWCNT nanocomposites (Young modulus, tensile strength at yield, stress at break and strain at break) were measured before and after the annealing at constant crosshead speed of 100 mm/min. Furthermore, the DC conductivity of the TPU/MWCNT injection molding specimens was measured before and after annealing, and the percolation thresholds were determined based on following the percolation theory.

• Periodical: Key Engineering Materials (Volume 699)
• Pages: 8-17
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.699.8
• Online since: July 2016
• Authors: Ionut Laurentiu Sandu*, Razvan Rosculet, Catalin Fetecau
• Keywords: Annealing, Electrical Properties, Injection Molding, Mechanical Properties, TPU/MWCNT

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