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Synthesis and characterization of self‐doped poly(aniline‐ co ‐aminonaphthalene sulfonic acid) nanotubes
Author(s) -
Wei Zhixiang,
Wan Meixiang
Publication year - 2002
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.11541
Subject(s) - aniline , sulfonic acid , polyaniline , thermal stability , polymer chemistry , materials science , copolymer , conductive polymer , scanning electron microscope , covalent bond , polymer , doping , transmission electron microscopy , chemical engineering , chemistry , organic chemistry , polymerization , nanotechnology , composite material , optoelectronics , engineering
Self‐doped poly(aniline‐ co ‐aminonaphthalene sulfonic acid) (PANI‐ANSA) was synthesized by the copolymerization of 5‐aminonaphthalene‐2‐sulfonic acid (ANSA) and aniline. Scanning electron microscopy and transmission electron microscopy showed that the morphology of PANI‐ANSA synthesized at a high molar ratio of aniline to ANSA was nanotubular, but at a low molar ratio, only a granular morphology formed. A possible formation mechanism for nanotubes was proposed. PANI‐ANSA had better thermal stability than HCl‐doped polyaniline; the highest onset decomposition temperature was as high as 340°C because of SO 3 H linked with the polymer backbone by a covalent bond. PANI‐ANSA was partially soluble in basic solutions, and its conductivity was between 10 −2 and 10 −4 S/cm, depending on the sulfonation degree. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 87: 1297–1301, 2003