Discontinuity of physical properties of carbon nanotube/polymer composites at the percolation threshold

作者：Carponcin Delphine; Dantras Eric^*; Dandurand Jany; Aridon Gwenaelle; Levallois Franck; Cadiergues Laurent; Lacabanne Colette

来源：Journal of Non-Crystalline Solids, 2014, 392: 19-25.

DOI：10.1016/j.jnoncrysol.2014.03.022

• Carbon nanotubes
• Polymer-matrix composites
• Electrical percolation threshold
• Glass temperature depression

Evolution of DC conductivity with double-walled carbon nanotube concentration in a polyamide 11 matrix displays the electrical percolation phenomenon. The percolation threshold is observed for this composite at 0.85 wt.%. Thermal, mechanical and dielectric manifestations of the glass transition have been investigated as a function of carbon nanotube content. Thermal and mechanical analyses have shown a depression of the glass transition temperature or its mechanical manifestation at the percolation threshold. Regarding the dielectric modulus, three distinct behaviors (below, at, and above percolation threshold) have been observed. A discussion about the interactions between the polymer matrix and the conductive fillers will be proposed to further the understanding of the discontinuity of physical properties at the percolation threshold.

• 出版日期2014-6-1