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Effect of γ‐irradiation and temperature on the structure of metal chloride treated poly(acrylamide)
Author(s) -
Moharram M. A.,
Rabie S. M.,
Daghistani A. Y.
Publication year - 1993
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.1993.070500309
Subject(s) - acrylamide , metal , irradiation , metal ions in aqueous solution , polymer , chloride , absorption spectroscopy , ion , absorption (acoustics) , chemistry , atmospheric temperature range , polymer chemistry , absorption band , spectral line , photochemistry , materials science , nuclear chemistry , organic chemistry , copolymer , optics , physics , astronomy , meteorology , nuclear physics , composite material
The gamma‐induced changes in the structure of Poly(Acrylamide) (PAAm) treated with metal chlorides were investigated by following the corresponding variations in their ultra‐violet spectra. Careful examination of UV spectra revealed that irradiation of the specimens results in the appearance of an absorption peak at 275 nm whose intensity depends on the applied dose and the nature of the metal ions. This band is ascribed to the formation of the carbonyl group. The results indicate that the dependence of the intensities of the band at 275 nm on the nature of the metal used provides strong evidence for the formation of metal polymer complexes. It was found that the pretreatment of PAAm with the appropriate concentration of ZnCl 2 , CoCl 2 , or NiCl 2 reduces the effects of heating and the oxidation effects of γ‐irradiation. These results show that these metal ions can be used as stabilizers against thermal degradation of PAAm in the temperature range up to 160°C. © 1993 John Wiley & Sons, Inc.