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Studies on the electrical conductivity of carbon black filled polymers
Author(s) -
Tang Hao,
Chen Xinfang,
Tang Aoqing,
Luo Yunxia
Publication year - 1996
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19960118)59:3<383::aid-app1>3.0.co;2-l
Subject(s) - carbon black , electrical resistivity and conductivity , high density polyethylene , materials science , percolation (cognitive psychology) , composite material , polyethylene , quantum tunnelling , polymer , percolation threshold , conductivity , condensed matter physics , chemistry , physics , natural rubber , optoelectronics , quantum mechanics , neuroscience , biology
The conductivity mechanism for a carbon black (CB) filled high‐density polyethylene (HDPE) compound was investigated in this work. From the experimental results obtained, it can be seen that the relation between electrical current density ( J ) and applied voltage across the sample ( V ) coincides with Simmons's equation (i.e., the electrical resistivity of the compound decreases with the applied voltage, especially at the critical voltage). The minimum electrical resistivity occurs near the glass transition temperature ( T g ) of HDPE (198 K). It can be concluded that electron tunneling is an important mechanism and a dominant transport process in the HDPE/CB composite. A new model of carbon black dispersion in the matrix was established, and the resistivity was calculated by using percolation and quantum mechanical theories. © 1996 John Wiley & Sons, Inc.