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Electrical resistance of CNT-PEEK composites under compression at different temperatures.

Mohiuddin M, Van Hoa S - Nanoscale Res Lett (2011)

Bottom Line: Advanced thermoplastic composites made of three different weight percentages (8%, 9%, and 10%) of multiwalled CNTs and polyether ether ketone (PEEK) were prepared by shear mixing process.The temperature- and pressure-dependent electrical resistance of these CNT-PEEK composites have been studied and presented in this paper.It has been found that electrical resistance decreases significantly with the application of heat and pressure.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Mechanical and Industrial Engineering, Concordia Centre for Composites, Centre for Applied Research on Polymers and Composites (CREPEC), Concordia University, 1455 de Maisonneuve Blvd, W Montréal, Québec, Canada H3G 1M8. mohi92@gmail.com.

ABSTRACT
Electrically conductive polymers reinforced with carbon nanotubes (CNTs) have generated a great deal of scientific and industrial interest in the last few years. Advanced thermoplastic composites made of three different weight percentages (8%, 9%, and 10%) of multiwalled CNTs and polyether ether ketone (PEEK) were prepared by shear mixing process. The temperature- and pressure-dependent electrical resistance of these CNT-PEEK composites have been studied and presented in this paper. It has been found that electrical resistance decreases significantly with the application of heat and pressure.

No MeSH data available.


Related in: MedlinePlus

Electrical resistance vs. pressure at room temperature and 140°C.
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Figure 3: Electrical resistance vs. pressure at room temperature and 140°C.

Mentions: Figure 3 shows the effect of both temperature and pressure. Note that the same three samples were used to produce the results in Figures 2 and 3. The results in Figure 2 were obtained first. For example, the sample with 8% CNT was heated to 140°C while the resistances were measured. This sample was then cooled down, and pressure and temperature were applied to produce the results shown in Figure 3. The resistance values at room temperature and zero pressure in Figure 3 are slightly larger than those in Figure 2. For example, for 8% CNT, this value in Figure 3 is about 3,000 Ω while that in Figure 2 is about 3,300 Ω. This can be due to irreversible changes in the conducting networks caused by the initial heating process [7] which induces some residual conductivity. In Figure 3, two sets of curves are shown. The upper set of curves presents the results for room temperature, while the lower ones for 140°C. The following can be observed:


Electrical resistance of CNT-PEEK composites under compression at different temperatures.

Mohiuddin M, Van Hoa S - Nanoscale Res Lett (2011)

Electrical resistance vs. pressure at room temperature and 140°C.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211515&req=5

Figure 3: Electrical resistance vs. pressure at room temperature and 140°C.
Mentions: Figure 3 shows the effect of both temperature and pressure. Note that the same three samples were used to produce the results in Figures 2 and 3. The results in Figure 2 were obtained first. For example, the sample with 8% CNT was heated to 140°C while the resistances were measured. This sample was then cooled down, and pressure and temperature were applied to produce the results shown in Figure 3. The resistance values at room temperature and zero pressure in Figure 3 are slightly larger than those in Figure 2. For example, for 8% CNT, this value in Figure 3 is about 3,000 Ω while that in Figure 2 is about 3,300 Ω. This can be due to irreversible changes in the conducting networks caused by the initial heating process [7] which induces some residual conductivity. In Figure 3, two sets of curves are shown. The upper set of curves presents the results for room temperature, while the lower ones for 140°C. The following can be observed:

Bottom Line: Advanced thermoplastic composites made of three different weight percentages (8%, 9%, and 10%) of multiwalled CNTs and polyether ether ketone (PEEK) were prepared by shear mixing process.The temperature- and pressure-dependent electrical resistance of these CNT-PEEK composites have been studied and presented in this paper.It has been found that electrical resistance decreases significantly with the application of heat and pressure.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Mechanical and Industrial Engineering, Concordia Centre for Composites, Centre for Applied Research on Polymers and Composites (CREPEC), Concordia University, 1455 de Maisonneuve Blvd, W Montréal, Québec, Canada H3G 1M8. mohi92@gmail.com.

ABSTRACT
Electrically conductive polymers reinforced with carbon nanotubes (CNTs) have generated a great deal of scientific and industrial interest in the last few years. Advanced thermoplastic composites made of three different weight percentages (8%, 9%, and 10%) of multiwalled CNTs and polyether ether ketone (PEEK) were prepared by shear mixing process. The temperature- and pressure-dependent electrical resistance of these CNT-PEEK composites have been studied and presented in this paper. It has been found that electrical resistance decreases significantly with the application of heat and pressure.

No MeSH data available.


Related in: MedlinePlus