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Effect of carbon black structure on low‐strain conductivity of polypropylene and low‐density polyethylene composites
Author(s) -
Fathi Atefeh,
Hatami Kianoosh,
Grady Brian P.
Publication year - 2012
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.22115
Subject(s) - carbon black , materials science , composite material , polypropylene , low density polyethylene , polyethylene , electrical resistivity and conductivity , ultimate tensile strength , percolation (cognitive psychology) , composite number , percolation threshold , strain (injury) , carbon fibers , conductivity , natural rubber , medicine , chemistry , electrical engineering , biology , neuroscience , engineering
The influences of carbon black (CB) structure on the percolation threshold, mechanical properties, and strain‐resistivity response of polymer composites are studied. Low‐density polyethylene (LDPE) and polypropylene (PP) samples were blended with five different types of CB differing in structure. Relatively low strains were studied; the maximum strain was 10%. It was found that the CB concentration for maximum strain‐sensitivity of the electrical conductivity is higher for low structure carbon blacks but is essentially independent of the CB structure for medium‐ to high‐structure carbon blacks. However, the composite containing the largest particle size carbon black clearly showed the highest strain‐sensitivity to electrical conduction. The mechanical properties and sensitivity of electrical resistivity to tensile strain of the filled composites examined in the study are also presented and discussed. POLYM. ENG. SCI., 2012. © 2011 Society of Plastics Engineers