Premium
Synthesis and characterization of poly(pyridylurea) and poly(pyridylthiourea), potentially semiconducting polymers
Author(s) -
Díaz F. R.,
Godoy A.,
Moreno J.,
Bernède J. C.,
Del Valle M. A.,
Tagle L. H.,
East G. A.
Publication year - 2007
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.26209
Subject(s) - polymer , thermal stability , materials science , x ray photoelectron spectroscopy , polymer chemistry , pyridine , phosgene , solvent , doping , conductivity , chemical engineering , analytical chemistry (journal) , chemistry , organic chemistry , composite material , optoelectronics , engineering
Poly(pyridylureas) and poly(pyridylthioureas) were synthesized by reacting 2,6‐diaminopyridine with phosgene and thiophosgene, respectively, using THF and pyridine as solvent. The synthesized polymers were characterized by IR‐spectroscopy, elemental analysis, and X‐ray photoelectron spectroscopy. Thermal stability of the polymers was determined by thermal degradation between 35°C and 700°C. The 50% weight loss of polypyridylureas was above 400°C while for the polypyridylthioureas it was above 450°C. Undoped poly(pyridylureas) and poly(pyridylthioureas) behave as semiconductors, σ = 10 −9 (Ω cm) −1 . After doping with I 2 and SbF 5 , the electrical conductivity increases several orders of magnitude, σ = 10 −7 (Ω cm) −1 . © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007