29.06.2013 Views

a) b - École Polytechnique de Montréal

a) b - École Polytechnique de Montréal

a) b - École Polytechnique de Montréal

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

PMMA<br />

Figure 2-23. TEM micrograph of a 50/50 PS/PMMA blend filled with 2 wt% CB.<br />

2.3.1.1.2 Percolation Threshold of Carbon-Nanotube Polymer Composites<br />

Figure 2-24 clearly shows a large spread in the number of investigations for polymer/carbon<br />

nanotubes in different polymer matrices. Figure 2-24 also shows the minimum observed<br />

percolation thresholds C together with the number of publications for each polymer matrix.<br />

This study shows that for all C > 0.2 wt% of carbon nanotubes, no more than two papers could<br />

be exploited. This finding supports the belief that with optimized dispersion methods a<br />

percolation threshold C ≈ 0.1 wt% might be obtainable for nearly any CNT/polymer<br />

system(Bauhofer & Kovacs, 2009).<br />

2.3.1.1.3 Disadvantages of Conductive Fillers, Especially Carbon Black<br />

The great majority of commercial resins are compoun<strong>de</strong>d with conductive fillers to create<br />

conductive composites. The most commonly used composite is 15–30% carbon black in polymer<br />

to make containers, trays, bags, work surfaces, wrist straps, etc.<br />

PS<br />

54

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!