FT-IR study of gamma-radiation induced degradation of polyvinyl alcohol (PVA) and PVA/humic acids blends |
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| Authors: | Michal Ilčin Oľga Holá Barbora Bakajová Jiří Kučerík |
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| Institution: | 1.Institute of Physical Chemistry and Chemical Physics,Slovak University of Technology,Bratislava,Slovak Republic;2.Institute of Applied and Physical Chemistry, Faculty of Chemistry,Brno University of Technology,Brno,Czech Republic |
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| Abstract: | Samples of pure polyvinyl alcohol (PVA) and PVA doped with humic acids were exposed to gamma radiation. Gamma rays induced
the degradation of the pure polymer. Degradation changes were observed using ATR FT-IR equipment. Dehydration, double bond
creation, and their subsequent oxidation (surrounding atmosphere was air) were found out. Also, other degradation reactions
(e.g. chain scission, cyclization) occur simultaneously. Formation of C=C and C=O bonds is apparent from FT-IR spectra. In
contrast the presence of humic acids in the PVA sample showed stabilizing effect on PVA structure within the concentration
range 0.5–10%. |
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