NDLI: Nonlinear conductive properties and scaling behavior of conductive particle filled high-density polyethylene composites

Content Provider	Springer Nature Link
Author	Zheng, Qiang Shen, Lie Li, Wenchun Song, Yihu Yi, Xiaosu
Copyright Year	2005
Abstract	The blends prepared by incorporation of carbon black (CB) or graphite powder (GP) into high-density polyethylene (HDPE) matrix have been novel and extensively applied polymeric positive temperature coefficient (PTC) composites. A phenomenological model was proposed on the basis of the GEM equation and the dilution effect of filler volume fraction due to the thermal volume expansion of the polymer matrix. Accordingly, the contribution of the thermal expansion of the matrix to the jump-like PTC transition of the composites was quantitatively estimated and a mechanical explanation was given. It was proved that the contribution of the volume expansion to PTC effect decreased for HDPE/CB composites crosslinked through electron-beam irradiation. Furthermore, the influences of the filler content, temperature and crosslinking on the self-heating behavior as well as the nonlinear conduction characteristics at electrical-thermal equilibrium state were examined. Based on the electric-field and initial resistivity dependence of the self-heating temperature and resistance dependence of the critical field, the mechanisms of the self-heating of the polymeric PTC materials were evaluated. The intrinsic relations between macroscopic electrical properties and microscopic percolation network at electrical-thermal equilibrium state were discussed according to the scaling relationship between the self-heating critical parameter and the conductivity of materials.
Starting Page	385
Ending Page	395
Page Count	11
File Format	PDF
ISSN	10016538
Journal	Chinese Science Bulletin
Volume Number	50
Issue Number	5
e-ISSN	18619541
Language	English
Publisher	Science in China Press
Publisher Date	2005-01-01
Publisher Place	Beijing
Access Restriction	Subscribed
Subject Keyword	percolation PTC effect thermal volume expansion HDPE/CB composite HDPE/GP composite crosslinking Life Sciences Physics Chemistry/Food Science Science Geosciences Engineering
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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