Carbon black self-networking induced co-continuity of immiscible polymer blends

Effect of blend ratio on the morphology and electromagnetic properties of nanoparticles incorporated natural rubber blends

“…1, the CCB aggregates of CCB/NR composite, near to individual CCB size, is smaller than that of CCB/ENR, which confirms that CCB is preferentially located in the NR phase. Due to the similar phase contrast of NR and ENR derived from the same polyisoprene chain backbone, it is difficult to identify the NR and ENR phase in NR/ENR blend by etching one of the phases [18] or using phase contrast difference of tow components [25]. However, CCBs in NR/ENR blend shows a blend ratio-depended morphology variation (Fig.…”

“…In this case, the effective concentration of nanofillers can be significantly improved by selectively localizing them in a desired phase of co-continuous blend under the thermodynamic force. Wu et al have designed immiscible acrylonitrilebutadiene-styrene/polyamide blends with CBs, and achieved electrical percolation threshold of 2 phr (means part per hundred rubber) [18]. Cao's work in polystyrene/poly(vinylidene fluoride) blends also indicates that improved thermal conductivity and flame retardancy can be achieved by controlling surface modification and selective localization of SiC nanoparticles [19].…”

Enhanced electrical conductivity and mechanical properties of ABS/EPDM composites filled with graphene

“…Challenges are remained to effectively reduce the critical content of the conductive fillers while keep the same excellent electrical conductivity, thus remarkable mechanical performance could be achieved. To solve this problem, two kinds of methods are usually adopted: (1) solution intercalation to obtain a well dispersed matrix or combine the conductive fillers with polymer via in-situ polymerization when functional groups exist on the surface of fillers [7,8]; (2) mixed with another polymer to realize co-continuity [9,10]. One polymer disperses in another polymer is usually in the form of sea-island microstructure to form a dispersed phase, conductive fillers are designed to selectively disperse in the continuous phase to lower the percolation threshold.…”

Evaluation by tunneling effect for the temperature-dependent electric conductivity of polymer-carbon fiber composites with visco-elastic properties

“…[1][2][3][4][5][6][7][8][9][10][11][12] The conductivity increase up to 0 1C by the enhancement of electron transport has been attributed to two mechanisms, electron hopping [13][14][15][16][17] and electron tunneling. [2][3][4][5][18][19][20][21][22] Electron hopping is thought to occur by two mechanisms.…”