Narrowing the size distribution of the polymer acid improves PANI conductivity

Joung Eun Yoo, Tracy L. Bucholz, Suyong Jung, Yueh Lin Loo

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49 Scopus citations


By narrowing the size distribution of the polymer acid template, polyaniline (PANI) that is subsequently template synthesized exhibits enhanced conductivity. We used poly(2-acrylamido-2-methyl-1-propanesulfonic acid), PAAMPSA, as the polymer acid and it was synthesized by both conventional free-radical polymerization and atom transfer radical polymerization (ATRP). ATRP-derived PAAMPSA, or aPAAMPSA, has a narrower size distribution compared to conventional PAAMPSA at comparable molecular weights. In general, PANI-aPAAMPSA is two to three times as conductive as PANI-PAAMPSA. The enhanced conductivity of PANI-aPAAMPSA is strongly correlated with increases in the conjugation length and crystallinity of PANI. More surprisingly, PANI-aPAAMPSA adopts a crystal structure that is different from that of PANI-PAAMPSA, but one that is similar to that of PANI doped with a molecular acid counterpart of AAMPSA.

Original languageEnglish (US)
Pages (from-to)3129-3135
Number of pages7
JournalJournal of Materials Chemistry
Issue number26
StatePublished - 2008

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Materials Chemistry


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