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Effect of iron oxide on the vulcanization and electrical properties of conductive butyl rubber composites
Author(s) -
ElTantawy F,
Bakry A,
ElGohary A R
Publication year - 2000
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/1097-0126(200012)49:12<1670::aid-pi589>3.0.co;2-i
Subject(s) - vulcanization , materials science , composite material , natural rubber , electrical resistivity and conductivity , ceramic , temperature coefficient , conductivity , dielectric , hot pressing , microstructure , composite number , oxide , metallurgy , electrical engineering , chemistry , optoelectronics , engineering
Rubber ceramic composite, negative temperature coefficient of conductivity (NTCC) thermistors, are widely used in industry because of the high dependence of their electrical conductivity on temperature. The effect of iron oxide (Fe 3 O 4 ) on the vulcanization process, DC conductivity, thermoelectric power, dielectric constant and I–V characteristics have been measured. Also the conduction mechanism is discussed. A hot‐pressing technique has been used to enhance the microstructure core of rubber composites. It has been found that Fe 3 O 4 acts as a catalyst during vulcanization process and the characteristic time constant during vulcanization decreases as the content of Fe 3 O 4 increases. © 2000 Society of Chemical Industry