Improving the electrical conductivity of polymer acid-doped polyaniline by controlling the template molecular weight

Joung Eun Yoo, Jennifer L. Cross, Tracy L. Bucholz, Kwang Seok Lee, Matthew P. Espe, Yueh Lin Loo

Research output: Contribution to journalArticle

99 Scopus citations

Abstract

We report the synthesis and characterization of a series of polyanilines (PANI) that are templated with a polymer acid at varying molecular weights. The polymer acid template of choice, poly(2-acrylamido-2-methyl-1-propanesulfonic acid), or PAAMPSA, was synthesized via conventional free-radical polymerization with molecular weights ranging from 45 kg mol-1 to 724 kg mol -1. Subsequent aniline polymerization in the presence of PAAMPSA yielded water-dispersible, conductive PANI-PAAMPSA. The electrical conductivity of PANI-PAAMPSA increases by approximately three-fold with decreasing PAAMPSA molecular weight. This trend is accompanied by significant structural changes, including increases in PANI crystallinity and conjugation length. These conductivities (0.4-1.1 S cm-1) exceed the highest reported for polymer acid-doped PANI systems.

Original languageEnglish (US)
Pages (from-to)1268-1275
Number of pages8
JournalJournal of Materials Chemistry
Volume17
Issue number13
DOIs
StatePublished - Mar 26 2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

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