On the percolative behavior of carbon black cross‐linked polyethylene systems

Abstract

The dielectric properties of peroxide cross‐linked polyethylene–carbon black composite systems are described in the frequency range between 10 and 107 Hz as a function of frequency and carbon black loading. Very high values for the dielectric constant were obtained when measuring conductive samples. A percolative model gives a suitable explanation, within experimental limits of the properties of the systems studied.

Crystallinity and dielectric relaxations in semi-crystalline poly(ether ether ketone)

“…Besides, conductivity relaxation can be present in more conducting composite materials like polyethylene-carbon black [51] or in polystyrene with a significant content of glass beads [34] leading to percolation phenomenon. The data at low frequencies (low M 0 ) fit the semicircle quite well (a ¼ 1 and b ¼ 1).…”

Hybrid electro-conductive composites with improved toughness, filled by carbon black

“…CB is one of the most frequently used fillers for the improvement of the electrical conductivity of polymers [1][2][3][4][5][6][7]. These composites are frequently used as heaters [8], sensors for chemical vapours [9], electro-conductive rubbers [10], etc.…”

Electrical and thermal properties of composite of liquid crystalline polymer filled with carbon black

“…The relatively low percolation threshold in CB-filled polymer systems is not uncommon 6 if the CB agglomerates in the polymer matrix and forms conductive networks. 15 On the other hand, as shown in Figure 4, the resistivity measured for the three directions of the samples did not show obvious differences at low volume fractions. Above the percolation threshold, although the resistivity in the three directions at one specific volume fraction (4%) exhibited large differences ( was about 40 times greater in the Z direction than in the X direction), no large difference was found for other volume fractions.…”