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Optical studies of pure and gelatin‐doped poly(vinyl alcohol) films irradiated with fast neutrons
Author(s) -
Abd ElKader F. H.,
Gaafar S. A.,
Rizk M. S.,
Kamel N. A.
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(19990613)72:11<1395::aid-app3>3.0.co;2-8
Subject(s) - vinyl alcohol , gelatin , materials science , irradiation , doping , neutron , polymer chemistry , nuclear chemistry , radiochemistry , chemical engineering , polymer science , composite material , organic chemistry , chemistry , polymer , nuclear physics , optoelectronics , physics , engineering
The ultraviolet (UV) and infrared (IR) spectra of pure poly(vinyl alcohol) (PVA) and gelatin–doped PVA films with concentrations (2, 5, 7, 10, and 15 wt %) were studied before and after irradiation with neutron fluences in the range of 10 5 –10 8 n/cm 2 . The obtained data revealed that the addition of gelatin and neutron irradiation causes structural variation in the PVA network. The analysis of the UV spectra showed that the increase of dopant concentration above 5 wt % gelatin makes the sample less resistant to a degradation effect caused by neutron irradiation. It was also found that the intensity of the band at 210 nm increases by increasing dopant concentration. Careful examination of the infrared spectra indicated that the induced percent crystallinity of the sample containing 5 wt % gelatin has more stability than the other doped samples. Neutron irradiation also results in the appearance of new absorption bands and irregular change in the absorbance of some IR bands. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 72: 1395–1406, 1999