"I2-Doping" of 1,4-polydienes

Liming Dai, Albert W H Mau, Hans J. Griesser, David Winkler, Tom H. Spurling, Xiaoyin Hong, Yongyuan Yang, J. W. White

Research output: Contribution to journalArticleOther

13 Citations (Scopus)


The discovery, in 1988, that "iodine-doped" rubber can conduct electricity attracted a great deal of interest [1,2]. However, it also generated some fundamental questions [2]: First, what is the mechanism from which the conductivity of "I2-doped" rubbers arises? Second, why does cis-1,4-polybutadiene not become electrically conductive by "I2-doping", but its trans-conterpart does? Third, what is the effect of "I2-doping" and conductivity in the rubber component on rubber-containing conducting composites and/or copolymers? We have previously demonstrated that "I2-doping" of cis-1,4-polyisoprene produces conjugated sequences of unsaturated double bonds in the polymer backbone, which confer conductivity. Recently, we have found that "I2-doping" of cis-1,4-polybutadiene, unlike the trans-isomer, does not lead to the formation of conjugated sequences at room temperature - a finding which leads to the formation of conducting patterns through patterned photoisomerization of cis-1,4-polybutadiene films followed by "I2-doping". We have also observed, for the first time, the occurrence of "I2-doping" of the polyisoprene component in polyisoprene-polyacetylene copolymers. 

Original languageEnglish
Pages (from-to)563-566
Number of pages4
JournalSynthetic Metals
Issue number1-3
Publication statusPublished - 1 Mar 1995
Externally publishedYes

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