Premium
Properties and applications of filled conductive polymer composites
Author(s) -
Yi XiaoSu,
Wu Guozhang,
Pan Yi
Publication year - 1997
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/(sici)1097-0126(199710)44:2<117::aid-pi811>3.0.co;2-l
Subject(s) - materials science , composite material , thermosetting polymer , volume fraction , carbon black , polymer , temperature coefficient , electrical resistivity and conductivity , thermal conductivity , electrical conductor , natural rubber , electrical engineering , engineering
The electrical properties of polymers filled with different types of conducting particles are reviewed. Following a theoretical description of a general effective media (GEM) equation, the experimental conductivity–volume fraction data for thermoplastic filled with vanadium oxide particles as well as thermosetting polymer composites, are fitted to the equation. The calculated property‐related parameters in the equation are discussed. The electrical conductivity of the composites is combined with an extremely large positive temperature coefficient (PTC) effect, depending on the filler type (V 2 O 3 or carbon black), as well as on its distribution and volume fraction. Both melting and recrystallization behaviour are responsible for the PTC effect. Due to a conductive filamentary network across the medium, a localized thermal effect comes into existence, leading to self‐heating of the body. This gives the composites potential application, for example, in plastic welding. Preliminary experimental results are reported. ©1997 SCI