Non-universal scaling behavior of polymer-metal composites across the percolation threshold
The universal percolation behavior i.e. σeff(ω,fcon≈fc)∝ωx and εeff(ω,fcon≈fc)∝ω-y is satisfied; with x + y = 1, where σeff is the effective ac conductivity of the composite, ω is the frequency of applied ac signal and fc is percolation threshold. The exponents (x = 0.72 and y = 0.28) obtained under...
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doaj-5f6d900cace64d56b05c133b7ccdbec02020-11-24T23:45:05ZengElsevierResults in Physics2211-37972015-01-015C13614110.1016/j.rinp.2014.02.005Non-universal scaling behavior of polymer-metal composites across the percolation thresholdMaheswar Panda0V. Srinivas1A.K. Thakur2Department of Physics and Meteorology, Indian Institute of Technology Kharagpur, Kharagpur 721302, IndiaDepartment of Physics and Meteorology, Indian Institute of Technology Kharagpur, Kharagpur 721302, IndiaDepartment of Physics and Meteorology, Indian Institute of Technology Kharagpur, Kharagpur 721302, IndiaThe universal percolation behavior i.e. σeff(ω,fcon≈fc)∝ωx and εeff(ω,fcon≈fc)∝ω-y is satisfied; with x + y = 1, where σeff is the effective ac conductivity of the composite, ω is the frequency of applied ac signal and fc is percolation threshold. The exponents (x = 0.72 and y = 0.28) obtained under the inter-cluster polarization model for the case of 3D systems are consistent with the experimental values. The critical exponents s, s′ and t which characterize the divergence of εeff and σeff in the vicinity of fc show non-universal values. The non-universality of s, s′ and t is correlated with the extent of spatial connectivity of filler particles, which is reflected from the experimental values of loss tangent.http://www.sciencedirect.com/science/article/pii/S2211379714000072Polymer compositesPercolation in phase transitionCritical exponentsLoss tangent |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Maheswar Panda V. Srinivas A.K. Thakur |
spellingShingle |
Maheswar Panda V. Srinivas A.K. Thakur Non-universal scaling behavior of polymer-metal composites across the percolation threshold Results in Physics Polymer composites Percolation in phase transition Critical exponents Loss tangent |
author_facet |
Maheswar Panda V. Srinivas A.K. Thakur |
author_sort |
Maheswar Panda |
title |
Non-universal scaling behavior of polymer-metal composites across the percolation threshold |
title_short |
Non-universal scaling behavior of polymer-metal composites across the percolation threshold |
title_full |
Non-universal scaling behavior of polymer-metal composites across the percolation threshold |
title_fullStr |
Non-universal scaling behavior of polymer-metal composites across the percolation threshold |
title_full_unstemmed |
Non-universal scaling behavior of polymer-metal composites across the percolation threshold |
title_sort |
non-universal scaling behavior of polymer-metal composites across the percolation threshold |
publisher |
Elsevier |
series |
Results in Physics |
issn |
2211-3797 |
publishDate |
2015-01-01 |
description |
The universal percolation behavior i.e. σeff(ω,fcon≈fc)∝ωx and εeff(ω,fcon≈fc)∝ω-y is satisfied; with x + y = 1, where σeff is the effective ac conductivity of the composite, ω is the frequency of applied ac signal and fc is percolation threshold. The exponents (x = 0.72 and y = 0.28) obtained under the inter-cluster polarization model for the case of 3D systems are consistent with the experimental values. The critical exponents s, s′ and t which characterize the divergence of εeff and σeff in the vicinity of fc show non-universal values. The non-universality of s, s′ and t is correlated with the extent of spatial connectivity of filler particles, which is reflected from the experimental values of loss tangent. |
topic |
Polymer composites Percolation in phase transition Critical exponents Loss tangent |
url |
http://www.sciencedirect.com/science/article/pii/S2211379714000072 |
work_keys_str_mv |
AT maheswarpanda nonuniversalscalingbehaviorofpolymermetalcompositesacrossthepercolationthreshold AT vsrinivas nonuniversalscalingbehaviorofpolymermetalcompositesacrossthepercolationthreshold AT akthakur nonuniversalscalingbehaviorofpolymermetalcompositesacrossthepercolationthreshold |
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1725497380208377856 |