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Preparation and properties of polyaniline doped with poly(thiophenylenesulfonic acid)
Author(s) -
Miyatake Kenji,
Cho JunSang,
Takeoka Shinji,
Tsuchida Eishun
Publication year - 1999
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/(sici)1521-3935(19991201)200:12<2597::aid-macp2597>3.0.co;2-o
Subject(s) - polyaniline , aniline , thermogravimetric analysis , dopant , polymerization , composite number , polymer chemistry , conductivity , salt (chemistry) , aqueous solution , materials science , conductive polymer , chemistry , redox , doping , nuclear chemistry , polymer , inorganic chemistry , composite material , organic chemistry , optoelectronics
A novel polyaromatic acid, poly(thiophenylenesulfonic acid) (PTPSA), prepared from a soluble precursor of poly(arylenesulfonium salt) was employed as a dopant for polyaniline (PAn). The electro‐oxidative polymerization of aniline in PTPSA aqueous solution gives an electroactive PAn/PTPSA composite with three redox couples at 0.16, 0.53, and 0.71V (vs. SCE). Composites of different molar ratio ([SO 3 H]/[An] = 0.10, 0.21, 0.42, 0.50, 0.83, 1.67) was prepared in order to confirm the transformation from the emeraldine base to its PTPSA salt, where a quantitative doping reaction was observed by means of UV‐VIS and IR measurements. The thermogravimetric analysis revealed that the composites do not decompose up to 200°C in nitrogen atmosphere. The composite ([SO 3 H]/[An] = 0.50) shows an electrical conductivity of 1.5 S·cm –1 at 30°C and 3.0×10 –1 S·cm –1 at 170°C. The composite retains its conductivity after heating at 150°C for 24 h.