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Pendant functional group copolyether sulfones. II. Modified copolyether sulfones with aminoazobenzene units
Author(s) -
Airinei Anton,
Butuc Elena,
Cozan Vasile
Publication year - 2000
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 - 10.1002/1097-4628(20000829)77:9<2009::aid-app17>3.0.co;2-a
Subject(s) - condensation polymer , oligomer , polymer chemistry , thermogravimetric analysis , photoisomerization , differential scanning calorimetry , inherent viscosity , aldehyde , polymer , materials science , chromophore , chemistry , intrinsic viscosity , photochemistry , organic chemistry , isomerization , catalysis , physics , thermodynamics
Modified copolyether sulfones with bulky azo pendant groups were synthesized by a polycondensation reaction of some polysulfones containing aldehyde groups with p ‐aminoazobenzene. The corresponding model compound and an azo oligomer were also prepared to compare their properties. The structure of the resulting compounds was confirmed by IR, 1 H‐NMR spectra, and elemental analyses. The polymers were characterized by reduced viscosity, thermogravimetric analysis, and differential scanning calorimetry. The photochemical behavior of the azoaromatic chromophores was followed by UV‐visible absorption spectroscopy. Two kinds of photoreactions (photoisomerization and photodecoloration) operate in these polymers. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 2009–2016, 2000