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Synthesis and characterization of polyarylureas. I. Potentially semiconducting polymers
Author(s) -
Díaz F. R.,
Godoy A.,
Moreno J.,
Bernède J. C.,
Sánchez C. O.,
Opazo A.,
Gargallo L.
Publication year - 2001
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.1501
Subject(s) - x ray photoelectron spectroscopy , phosgene , polymer , thermal stability , doping , pyridine , materials science , polymer chemistry , characterization (materials science) , infrared spectroscopy , solvent , degradation (telecommunications) , spectroscopy , elemental analysis , chemistry , analytical chemistry (journal) , chemical engineering , organic chemistry , nanotechnology , composite material , physics , telecommunications , optoelectronics , quantum mechanics , computer science , engineering
Abstract Polyarylureas were synthesized from the reaction between phosgene with aromatic diamines. Depending on the pH, the polyarylureas presented different colors when the solvent used was pyridine. The polyarylureas were characterized by IR spectroscopy, elemental analysis, and X‐ray photoelectron spectroscopy (XPS). To study the thermal stability of the polymers, a thermal degradation was performed between 35 and 700°C. The polyarylureas decomposed above 350°C. Without doping, polyarylureas are considered as semiconductors [σ = 10 −9 (Ωcm) − 1 ]; after doping with I 2 , their electrical conductivity increases by several orders of magnitude. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 822–830, 2001