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Effect of γ‐irradiation and temperature on the structure of metal‐chloride‐treated poly(vinyl alcohol)
Author(s) -
Rabie S. M.,
AbdelHakeem Nagwa,
Moharram M. A.
Publication year - 1990
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.1990.070400708
Subject(s) - crystallinity , vinyl alcohol , zinc , vinyl chloride , irradiation , ferric , ultraviolet , chemistry , alcohol , nuclear chemistry , infrared spectroscopy , chloride , polymer chemistry , infrared , materials science , photochemistry , inorganic chemistry , polymer , organic chemistry , copolymer , crystallography , physics , optoelectronics , nuclear physics , optics
The infrared and ultraviolet spectra of poly(vinyl alcohol)(PVA) treated with ferric chloride and zinc chloride were recorded. Careful examination of the infrared spectra revealed that these treatments cause significant changes in the crystallinity of PVA, particularly in the case of the treatment with ZnCl 2 . The results showed that exposure of untreated and FeCl 3 ‐treated PVA to 12 or 28 Mrds results in no observable changes in their ultraviolet and infrared spectral features, whereas exposure of ZnCl 2 ‐treated PVA at the same dosages, results in the appearance of an absorption band at 1595cm ‐1 corresponding to β‐diketone groups. It was also found that γ‐irradiation of ZnCl 2 ‐treated PVA produces a remarkable change in its crystallinity. Moreover, the effect of heat on the spectral features of the ZnCl 2 ‐treated PVA was discussed. It was found that the treatment of PVA with ZnCl 2 helps in oxidative degradation of PVA.