Temperature dependence of electrical resistivity for carbon black filled ultra-high molecular weight polyethylene composites prepared by hot compaction

Zhang, Cheng; Ma, Chao; Wang, Ping; Sumita, Masao

doi:10.1016/j.carbon.2005.05.006

Cited by 173 publications

(115 citation statements)

References 22 publications

Supporting

Mentioning

108

Contrasting

Unclassified

Order By: Relevance

“…The thin gaps between the adjacent conductive fillers, or the breakdowns of percolation networks increased with an increase in Joule heating or environment temperature in the case of the difference in thermal expansion. An expansion of the polymer matrix during heating increased the width of the gaps, and thus hindered the process of the electron tunneling [11]. Hindermann-Bischoff et.…”

Section: Introductionmentioning

confidence: 99%

“…Zhang et. al [11] have studied the temperature dependence of the electrical resistivity for the carbon black(CB)/ultra-high molecular weight polyethylene (UHMWPE) composites. They reported that the degree of the intermixing between CB and UHMWPE particles plays an important role in determining the electrical properties of the composites.…”

Section: Introductionmentioning

confidence: 99%

“…They reported that the degree of the intermixing between CB and UHMWPE particles plays an important role in determining the electrical properties of the composites. The temperature dependence of the electrical resistivity has been widely studied for CB filled various types of polymer [11,12]. However, there were few reports on the mechanism of PTC effects in nanocomposites, especially on the nanocomposites filled with VGCF.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Temperature dependence of electrical resistivity in carbon nanofiber/unsaturated polyester nanocomposites

Natsuki¹,

Ni²,

Wu³

2008

Polymer Engineering & Sci

View full text Add to dashboard Cite

This paper described the temperature dependence of electrical resistivity for carbon nanofiber (CNF)/unsaturated polyester resin (UPR) nanocomposites prepared by a solvent evaporation method. It was found that the CNF/UPR nanocomposites had quite low electrical percolation threshold due to CNFs having a large aspect ratio and being well dispersed into the UPR matrix. A Sharp decrease in the electrical resistivity was observed at about 1 wt% CNF content. The influence of CNF content on the electrical resistivity was investigated as a function of temperature in detail. The nanocomposites showed a positive temperature coefficient (PTC) effect for the resistivity, and had a strong temperature dependence near the percolation threshold. When the number of thermal cycles was increased, the electrical resistivity decreased and had a weak temperature dependence, especially in the case of melting temperature. Moreover, the size influences of CNFs on the electrical properties of nanocomposites were analyzed and discussed.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Temperature dependence of electrical resistivity in carbon nanofiber/unsaturated polyester nanocomposites

Natsuki¹,

Ni²,

Wu³

2008

Polymer Engineering & Sci

View full text Add to dashboard Cite

show abstract

“…After sintering, the segregated distribution of CB phase can be further preserved because the extremely high viscosity of PTFE at its melt state will minimize the migration of carbon particles into the polymer matrix and deformation of the polymer particles during processing. Only a slight degree of intermixing of the carbon black and PTFE particles in the interfacial regions occured when the polymer particles fused together and formed a continues phase in high temperatures above the T m of PTFE, resulting in a slight increase of the resistivity in comparison with the un-sintered ones [23]. As shown in Figure 2, the results indicate that the PTC intensity and room temperature resistivity are highly dependent on the CB concentration.…”

Section: Resultsmentioning

confidence: 87%

Positive temperature coefficient effects of carbon blackfilled polytetrafluoroethylene composites

2009

View full text Add to dashboard Cite

Carbon black (CB)-filled polytetrafluoroethylene (PTFE) composites were prepared by compact molding of a dry-mixture of CB and polymer powders followed by a sintering technology. The composites show a very low percolation threshold about 5 vol. %, which can be attributed to the segregated distribution of CB in the interfacial regions of PTFE particles. The PTFE/CB composites exhibit a high PTC transition temperature (>300 0 C), high PTC intensity (3.5) and no NTC effects. The absence of NTC effect of the composites was attributed to the extremely high viscosity of PTFE at temperatures above its melting point, which restricts the migration of CB particles and prevents the formation of new conductive networks.

show abstract

“…With reduction of filler content in mind, it should be pointed out that the choice of conductive filler by itself can make a significant difference in the percolation threshold of a filled polymer or blend. Carbon black (CB) had been the conductive filler of choice [14][15][16][17][18][19] for many years, until the recent surge in application of carbon nanotubes (CNTs) [20][21][22][23][24], which, due to their high aspect ratio, achieve percolation at much lower contents than CB. With lower filler content as the aim, CPCs based on polymer blends have been observed to achieve percolation at lower filler loadings than those based on a single polymer [12,[25][26][27].…”

mentioning

confidence: 99%

Conductivity of microfibrillar polymer-polymer composites with CNT-loaded microfibrils or compatibilizer: A comparative study

Panamoottil¹,

Pötschke²,

Lin³

et al. 2013

Express Polym. Lett.

View full text Add to dashboard Cite

Conductive polymer composites have wide ranging applications, but when they are produced by conventional melt blending, high conductive filler loadings are normally required, hindering their processability and reducing mechanical properties. In this study, two types of polymer-polymer composites were studied: i) microfibrillar composites (MFC) of polypropylene (PP) and 5 wt% carbon nanotube (CNT) loaded poly(butylene terephthalate) (PBT) as reinforcement, and ii) maleic anhydride-grafted polypropylene (PP-g-MA) compatibilizer, loaded with 5 wt% CNTs introduced into an MFC of PP and poly(ethylene terephthalate) (PET) in concentrations of 5 and 10 wt%. For the compatibilized composite type, PP and PET were melt-blended, cold-drawn and pelletized, followed by dry-mixing with PP-g-MA/CNT, re-extrusion at 200°C, and cold-drawing. The drawn blends produced were compression moulded to produce sheets with MFC structure. Using scanning electron microscopy, CNTs coated with PP-g-MA could be observed at the interface between PP matrix and PET microfibrils in the compatibilized blends. The volume resistivities tested by four-point test method were: 2.87•108 and 9.93•107 Ω•cm for the 66.5/28.5/5 and 63/27/10 (by wt%) PP/PET/(PP-g-MA/CNT) blends, corresponding to total CNT loadings (in the composites) of 0.07 vol% (0.24 wt%) and 0.14 vol% (0.46 wt%), respectively. For the non-compatibilized MFC types based on PP/(PBT/CNT) with higher and lower melt flow grades of PP, the resistivities of 70/(95/5) blends were 1.9•106 and 1.5•107 Ω•cm, respectively, corresponding to a total filler loading (in the composite) of 0.44 vol% (1.5 wt%) in both MFCs

show abstract

Temperature dependence of electrical resistivity for carbon black filled ultra-high molecular weight polyethylene composites prepared by hot compaction

Cited by 173 publications

References 22 publications

Temperature dependence of electrical resistivity in carbon nanofiber/unsaturated polyester nanocomposites

Temperature dependence of electrical resistivity in carbon nanofiber/unsaturated polyester nanocomposites

Positive temperature coefficient effects of carbon blackfilled polytetrafluoroethylene composites

Conductivity of microfibrillar polymer-polymer composites with CNT-loaded microfibrils or compatibilizer: A comparative study

Contact Info

Product

Resources

About