Selective Localization of Carbon Black in Immiscible Polymer Blends: A Useful Tool To Design Electrical Conductive Composites

Gubbels, Frédéric; Jérôme, Roland; Teyssié, Philippe; Vanlathem, Eric; Deltour, Robert; Calderone, A.; Parenté, V.; Brédas, Jean‐Luc

doi:10.1021/ma00085a049

Cited by 410 publications

(299 citation statements)

References 5 publications

Supporting

Mentioning

287

Contrasting

Unclassified

Order By: Relevance

“…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.…”

Section: Introductionsupporting

confidence: 72%

“…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.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Liang¹,

Bao²,

Tjong

2008

E-Polymers

View full text Add to dashboard Cite

Ternary high-density polyethylene/polystyrene/carbon nanofiber nano composites were fabricated by melt-compounding. The effect of melt compounding sequences on electrical conducting behavior of such composites was examined. Two compounding sequences were adopted in this study. Route I consisted of an initial melt mixing of HDPE and PS, followed by blending with CNFs. Route II involved an initial formation of the PS/CNF master batch, followed by blending with HDPE. The results showed that CNFs were dispersed in HDPE phase of Route I prepared HDPE/PS/CNF nanocomposites whilst they resided in PS phase of Route II formed nanocomposites. Electrical measurement showed that Route II prepared nanocomposites had a low percolation concentration of 1.1 vol% CNF.

show abstract

Section: Introductionsupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

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

Liang¹,

Bao²,

Tjong

2008

E-Polymers

View full text Add to dashboard Cite

show abstract

“…Unexpectedly, with the introduction of 15 phr nano-TiO 2 particles into the blend of PLLA/10PU, the size of the PU domains increases slightly (Figure 1b). This result is opposite to that usually seen in polymer blends filled with other nanofillers, such as silicon dioxide (SiO 2 ), clay and multi-walled carbon nanotubes (MWCNTs), where the size of dispersed-phase domains decreases significantly with adding small amounts of nanofillers [43][44][45]. Recently, Cai et al [46] confirmed that morphology evolution of immiscible polymer blends is strongly dominated by the self-agglomerating pattern of nanoparticles in polymer melts.…”

Section: Differential Scanning Calorimetry (Dsc)mentioning

confidence: 95%

Selective localization of titanium dioxide nanoparticles at the interface and its effect on the impact toughness of poly(L-lactide)/poly(ether)urethane blends

Xiu¹,

Bai²,

Huang³

et al. 2013

Express Polym. Lett.

View full text Add to dashboard Cite

Inorganic nanofillers are often added into polymer/elastomer blends as a third component to modify their performance. This work aims to clarify the role of interface-localized spherical nanoparticles in determining the impact toughness of polymer blends. The selective distribution of titanium dioxide (TiO2) nanoparticles in poly(L-lactide)/poly(ether) urethane (PLLA/PU) blends was investigated by using scanning electron microscope. It is interesting to find that, regardless of the method of TiO2 introduction, nano-TiO2 particles are always selectively localized at the phase interface between PLLA and PU, leading to a significant improvement in notched Izod impact toughness. The moderately weakened interfacial adhesion induced by the interfacially-localized nano-TiO2 particles is believed to be the main reason for the largely enhanced impact toughness

show abstract

“…The critical exponent's value is smaller than the universal value for a three-dimensional percolating system (t ¼ 1.94) [22]. As reported by Kilbride et al [23], values of t around 1.3 have been observed in polyaniline-PMMA [24,25] or carbon black-polyethylene [26] composites. Recently, t value of 0.97 [27] has been reported for pristine MWNTs (synthesised by CVD approach) and poly(bisphenol A carbonate) (PC) composites prepared by solution blending approach.…”

Section: Electrical Characterisationmentioning

confidence: 66%

Low electrical percolation threshold and PL quenching in solution-blended MWNT–MEH PPV nanocomposites

Bansal

Srivastava

Lal

et al. 2010

Journal of Experimental Nanoscience

View full text Add to dashboard Cite

Pristine multiwall carbon nanotubes (MWNT) (synthesised using CVD approach) and poly[2-methoxy-5-(2 0 -ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH PPV) based composites were prepared using a solution blending approach by employing various nanotube weight fractions. The prepared composites have been characterised using SEM, AFM, PL spectroscopy, UV-Vis studies and I-V characterisation. Increase in MWNT concentration has been found to quench the PL spectra of the composites suggesting photoinduced electron transfer from polymer to MWNT. The increase in MWNT concentration also increases the absorption of the composites. PL quenching and increase in absorption are desirable attributes for the design of photovoltaic systems. Also, the electrical conductivities of the composites can be described by the scaling law based on percolation theory and based upon the scaling law, a low electrical percolation threshold value (0.5 wt%) has been obtained for this composite system. The value of t (critical exponent) based on percolation theory is found to be 1.11. The low value of t is attributed to the aggregation and bundling of nanotubes in the prepared composites, as is evident from SEM and AFM micrographs. The turnon voltage is also found to be reduced in the case of polymer-nanotube composite system as compared to the pristine polymer system. Also, it has been observed that at higher weight percentages, the MWNTs form an immensely dense network and act as nanometric heat sinks, thus preventing the build up of large thermal effects, caused by the increased current in the pixels at higher voltages. Analysis of these optical and electrical properties is important before utilising the composite in organic electronics applications, in order to obtain more scientifically correct and repeatable results with fabricated devices.

show abstract

Selective Localization of Carbon Black in Immiscible Polymer Blends: A Useful Tool To Design Electrical Conductive Composites

Abstract: Introduction. It is well-known that the electrical resistivity of insulating polymers can be decreased by dispersing a conductive filler, e.g., carbon black (CB) throughout the polymer matrix.1-7 The critical amount of filler necessary to build up a continuous conductive

Cited by 410 publications

References 5 publications

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

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

Selective localization of titanium dioxide nanoparticles at the interface and its effect on the impact toughness of poly(L-lactide)/poly(ether)urethane blends

Low electrical percolation threshold and PL quenching in solution-blended MWNT–MEH PPV nanocomposites

Contact Info

Product

Resources

About