Design of sandwich structure conductive polypropylene/styrene‐butadiene‐styrene triblock copolymer/carbon black composites with inherent morphological tunability

Abstract

The insulator-conductor transition of conductive polymer composites (CPCs) can be ascribed to the fabrication of conductive networks, and the morphology of conductive networks plays a significant role in the electrical conductivity. This study presents CPCs with inherent morphology tunability which can be controlled by kinetic methods (i.e., mixing procedures and sequences, and polymer melt viscosity). Polypropylene (PP)/styrene-butadiene-styrene block copolymer (SBS) (50/50, in volume)/10 phr (parts per hundred of the polymer matrix) conductive carbon black (CB) composites prepared by different compounding sequences (PP/CB composites mixed with SBS, SBS/CB composites mixed with PP, and PP/SBS blend mixed with CB) are named as PC 10 S, SC 10 P, and PSC 10. With the difference between the phase morphologies, distribution, and dispersion of CB, the PP/SBS/CB composites realize seven orders of magnitude difference in resistivity. The volume resistivity (ρ v

Charge transport mechanism in dodecylbenzenesulfonic acid doped polyaniline/carbon black composites

“…The most adopting methods is to dope these conducting polymers with organic acids possessing long alkyl-chain sulfonic acids such as dodecylbenzenesulfonic acid (DBSA) and camphorsulphonic acid (CSA). 14 CB particles also have much greater tendency to form a conductive network due to their aggregate structure, 15 which is necessary to provide a high electrical property in comparison to the other conductive fillers, not only enhances its heat but chemical resistance as well. 16…”

“…The most adopting methods is to dope these conducting polymers with organic acids possessing long alkyl-chain sulfonic acids such as dodecylbenzenesulfonic acid (DBSA) and camphorsulphonic acid (CSA). 14 CB particles also have much greater tendency to form a conductive network due to their aggregate structure, 15 which is necessary to provide a high electrical property in comparison to the other conductive fillers, not only enhances its heat but chemical resistance as well. 16 PANI composites are attractive because they can combine with the properties of other compounds, and the composites of PANI with carbon nanotubes, 17,18 graphite, 19 graphene, 20 metal powders, 21 and carbon black (CB) 22,23 have been accepted to effectively improve the electric conductivity.…”

Crystallization induced segregated structure for outstanding conductive property with low percolation threshold

“…3,8,[17][18][19][20] It also depends on the selection of effective conductive filler, such as carbon black (CB), carbon nanotube, carbon fibers and graphene (GE), 19,[21][22][23][24][25] and the design of phase structure, e.g., segregated structure, double percolation structure and sandwich structure. 17,26,27 The matrix materials as the main component of CPCs play a decisive role in overall properties, and the electrical property primarily depends on the dispersion state of conductive filler, so many research reports about matrix components and the distribution of filler spring up. For the compact distribution of filler which can transfer charges effectively, it is necessary to adjust the matrix components and construct an excellent microstructure.…”

Multifunctional starch/carbon nanotube composites with segregated structure: Electrical conductivity, electromagnetic interference shielding effectiveness, thermal conductivity, and electro‐thermal conversion

“…[4][5][6][7] CPCs have been widely used in the electronics industry, such as electromagnetic interference (EMI) shielding, [8][9][10] sensors, 11,12 wearable electronic devices. 13,14 To achieve high electrical conductivity, researchers fabricate advanced CPCs by introducing conductive fillers such as carbon black, 15,16 graphite, 17,18 graphene, 19,20 carbon nanotube (CNT), 21,22 and carbon fiber 23 into the polymer matrix. However, the high content of conductive fillers will make the processing difficult, lead to high costs, and impair the mechanical properties of the matrix.…”