Improving the electrical conductivity of polymer acid-doped polyaniline by controlling the template molecular weight
2007; Royal Society of Chemistry; Volume: 17; Issue: 13 Linguagem: Inglês
10.1039/b618521e
ISSN1364-5501
AutoresJoung Eun Yoo, Jennifer L. Cross, Tracy L. Bucholz, Kwang Seok Lee, Matthew P. Espe, Yueh‐Lin Loo,
Tópico(s)Advanced Sensor and Energy Harvesting Materials
ResumoWe 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.
Referência(s)