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 PublicationArticlepeer-review

27 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/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.

Original languageEnglish
Pages (from-to)2833-2842
Number of pages10
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume39
Issue number22
DOIs
Publication statusPublished - 15 Nov 2001
Externally publishedYes

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

Fingerprint

Dive into the research topics of 'Reversible nonlinear conduction behavior for high-density polyethylene/graphite powder composites near the percolation threshold'. Together they form a unique fingerprint.

Cite this