Design of Electrical Composites: Determining the Role of the Morphology on the Electrical Properties of Carbon Black Filled Polymer Blends

Fabrication and electrical conducting behavior of carbon nanofiber reinforced high-density polyethylene/ polystyrene nanocomposites with low percolation threshold

“…Therefore, CNFs are not distributed in PS phase, but rather in HDPE phase of the nanocomposite. A similar preferential dispersion of fillers in HDPE phase has also been found in the PE/PS composites reinforced with carbon black particles [9][10][11][12]. The main reason for preferential dispersion of the fillers in HDPE phase is the large melt viscosity of PE compared to that of PS.…”

“…The percolation concentration is determined to be 1.1 vol%, being smaller than that of the PS/CNF composites of 1.7 vol%. During compounding of PS/CNF master batch and HDPE pellets, CNFs cannot migrate from PS into HDPE phase, because they need sufficient energy to surmount the HDPE/PS interfacial free energy barrier [9][10][11][12]. Therefore, CNFs still reside in PS phase.…”

Preparation of interconnected poly(ε-caprolactone) porous scaffolds by a combination of polymer and salt particulate leaching

“…For example, addition of a small amount of fillers (typically, 3 wt%) such as nano-clays, carbon black and calcium carbonate prevented the de-mixing or coalescence of the PS/PMMA polymer blend in presence of carbon dioxide [41]. In another investigation, the addition of black carbon in PE/PS blends-selectively localized into the PE phase-increases the stability of the co-continuous morphology during thermal treatment [42]. These authors explained the reduction in the coarsening rate during annealing by the viscosity increase in the filled-PE phase.…”

Nanocompósitos de poliuretana termoplástica e nanotubos de carbono de paredes múltiplas para dissipação eletrostática

“…Mas dependendo da adesão do polímero à carga, há formação de uma camada isolante em torno das partículas condutoras, diminuindo o contato entre os tubos e, em consequência, as propriedades de condução elétrica. Um balanço entre esses fatores traduz-se no aumento da condutividade da matriz, 38 de 10 -4 S/cm. Estes resultados são dependentes de vários fatores, tais como, tipo e razão de aspecto dos nanotubos, pureza da amostra, dispersão e orientação dos nanotubos na matriz e grau de recobrimento de polímero isolante sobre os nanotubos.…”