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Thermostabilizing effect of copper(II) bromide on poly(ethylene oxide) in their binary blends
Author(s) -
Gjurova K.,
Uzov C.,
Popov A.,
Zagortcheva M.,
Gavrailova G.
Publication year - 1999
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/(sici)1097-4628(19991227)74:14<3324::aid-app5>3.0.co;2-w
Subject(s) - thermogravimetry , ethylene oxide , copper , materials science , oxide , differential thermal analysis , copper oxide , thermal analysis , bromide , polymer chemistry , metal , chemical engineering , inorganic chemistry , thermal , chemistry , composite material , polymer , metallurgy , thermodynamics , copolymer , physics , diffraction , optics , engineering
Thermoanalytical (thermogravimetry, differential thermogravimetry, and differential thermal analysis) and structural (IR spectroscopy, light microscopy, etc.) methods were employed to estimate the thermal behavior of binary blends of poly(ethylene oxide) (PEO) with copper(II) bromide (CuBr 2 ) of various concentrations under the conditions of a broad temperature interval. Solid residues obtained after heating the blends at different characteristic stages of the thermal destruction were also studied. CuBr 2 introduced in concentrations of 5–10% exhibited a significant thermostabilizing effect on PEO in an air medium, regardless of the mode of the blend preparation. No data about the formation of crystallizing complexes or new compounds prepared from the starting materials on heating the blends were obtained within the concentration range studied (0.1–40% CuBr 2 ). An assumption for the formation of associations between the oxygen atoms of PEO and the metal ion, which obstruct the thermal oxidation processes to a certain degree, were made in order to explain the antioxidative mechanism of action of the inorganic salt. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 3324–3330, 1999