Reversible nonlinear conduction behavior for high-density polyethylene/graphite powder composites near the percolation threshold

Qiang Zheng; Yihu Song; Gang Wu; Xiaosu Yi

doi:10.1002/polb.10042

Reversible nonlinear conduction behavior for high-density polyethylene/graphite powder composites near the percolation threshold

Qiang Zheng, Yihu Song, Gang Wu, Xiaosu Yi

Research output: Journal Publication › Article › peer-review

28 Citations (Scopus)

Abstract

The reversible nonlinear conduction (RNC) behavior of high-density polyethylene/graphite powder composites with various graphite powder volume concentrations slightly above the threshold has been studied. The relationships between the current density (J) and electric field (E) of the composites, as shown in J(E) curves, can be well described by the scaling functions of J/J_c ∼ (E/E_c)^α1 when E < E_c and J/J_c ∼ (E/E_c)^α2 when E > E_c, where J_c is the crossover current density and E_c is the crossover electric field. The results indicate that J_c scales with the linear conductivity σ_o as J_c ∼ σ_o^x. It is believed that the macroscopic RNC is a combined result of the microscopic conduction processes, involving electronic transporting along carbon chains and tunneling or hopping across thin polymer bridges.

Original language	English
Pages (from-to)	2833-2842
Number of pages	10
Journal	Journal of Polymer Science, Part B: Polymer Physics
Volume	39
Issue number	22
DOIs	https://doi.org/10.1002/polb.10042
Publication status	Published - 15 Nov 2001
Externally published	Yes

Keywords

Conducting polymer composites
High-density polyethylene (HDPE)/graphite powder (GP)
Reversible nonlinear conduction
Scaling behavior

ASJC Scopus subject areas

Condensed Matter Physics
Physical and Theoretical Chemistry
Polymers and Plastics
Materials Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/polb.10042

Cite this

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title = "Reversible nonlinear conduction behavior for high-density polyethylene/graphite powder composites near the percolation threshold",

abstract = "The reversible nonlinear conduction (RNC) behavior of high-density polyethylene/graphite powder composites with various graphite powder volume concentrations slightly above the threshold has been studied. The relationships between the current density (J) and electric field (E) of the composites, as shown in J(E) curves, can be well described by the scaling functions of J/Jc ∼ (E/Ec)α1 when E < Ec and J/Jc ∼ (E/Ec)α2 when E > Ec, where Jc is the crossover current density and Ec is the crossover electric field. The results indicate that Jc scales with the linear conductivity σo as Jc ∼ σox. It is believed that the macroscopic RNC is a combined result of the microscopic conduction processes, involving electronic transporting along carbon chains and tunneling or hopping across thin polymer bridges.",

keywords = "Conducting polymer composites, High-density polyethylene (HDPE)/graphite powder (GP), Reversible nonlinear conduction, Scaling behavior",

author = "Qiang Zheng and Yihu Song and Gang Wu and Xiaosu Yi",

year = "2001",

month = nov,

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doi = "10.1002/polb.10042",

language = "English",

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journal = "Journal of Polymer Science, Part B: Polymer Physics",

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T1 - Reversible nonlinear conduction behavior for high-density polyethylene/graphite powder composites near the percolation threshold

AU - Zheng, Qiang

AU - Song, Yihu

AU - Wu, Gang

AU - Yi, Xiaosu

PY - 2001/11/15

Y1 - 2001/11/15

N2 - The reversible nonlinear conduction (RNC) behavior of high-density polyethylene/graphite powder composites with various graphite powder volume concentrations slightly above the threshold has been studied. The relationships between the current density (J) and electric field (E) of the composites, as shown in J(E) curves, can be well described by the scaling functions of J/Jc ∼ (E/Ec)α1 when E < Ec and J/Jc ∼ (E/Ec)α2 when E > Ec, where Jc is the crossover current density and Ec is the crossover electric field. The results indicate that Jc scales with the linear conductivity σo as Jc ∼ σox. It is believed that the macroscopic RNC is a combined result of the microscopic conduction processes, involving electronic transporting along carbon chains and tunneling or hopping across thin polymer bridges.

AB - The reversible nonlinear conduction (RNC) behavior of high-density polyethylene/graphite powder composites with various graphite powder volume concentrations slightly above the threshold has been studied. The relationships between the current density (J) and electric field (E) of the composites, as shown in J(E) curves, can be well described by the scaling functions of J/Jc ∼ (E/Ec)α1 when E < Ec and J/Jc ∼ (E/Ec)α2 when E > Ec, where Jc is the crossover current density and Ec is the crossover electric field. The results indicate that Jc scales with the linear conductivity σo as Jc ∼ σox. It is believed that the macroscopic RNC is a combined result of the microscopic conduction processes, involving electronic transporting along carbon chains and tunneling or hopping across thin polymer bridges.

KW - Conducting polymer composites

KW - High-density polyethylene (HDPE)/graphite powder (GP)

KW - Reversible nonlinear conduction

KW - Scaling behavior

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JO - Journal of Polymer Science, Part B: Polymer Physics

JF - Journal of Polymer Science, Part B: Polymer Physics

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Reversible nonlinear conduction behavior for high-density polyethylene/graphite powder composites near the percolation threshold

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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