Investigation of $\gamma$-irradiated polyvinylidene fluoride and its acute toxicity

Allayarov, Sadulla R.; Confer, Matthew P.; Demidov, Sergei V.; Yu. Allayarova, Uguljan; Mishenko, Denis V.; Klimanova, Elena N.; Dixon, David A.

doi:10.1016/j.jfluchem.2021.109885

Investigation of $$\gamma$$-irradiated polyvinylidene fluoride and its acute toxicity

Journal Article · Wed Sep 01 00:00:00 EDT 2021 · Journal of Fluorine Chemistry

DOI:https://doi.org/10.1016/j.jfluchem.2021.109885· OSTI ID:1977298

Allayarov, Sadulla R. ^[1]; Confer, Matthew P. ^[2]; Demidov, Sergei V. ^[3]; Yu. Allayarova, Uguljan ^[3]; Mishenko, Denis V. ^[3]; Klimanova, Elena N. ^[3]; Dixon, David A. ^[2]

Russian Academy of Sciences (RAS), Chernogolovka (Russian Federation); University of Alabama, Tuscaloosa, AL (United States); OSTI
University of Alabama, Tuscaloosa, AL (United States)
Russian Academy of Sciences (RAS), Chernogolovka (Russian Federation)

Polyvinylidene fluoride (PVDF) is an industrial polymer with many applications. The EPR spectrum of polyvinylidene fluoride (PVDF) irradiated by γ-rays at low temperature (-196°C) provides evidence for the presence of radicals formed by loss of a fluorine atom from PVDF, and polyenyl radicals. Polyenyl radicals dominate in the polymer irradiated at room temperature. Peroxide radicals formed as a result of oxidation of primary free radicals by atmospheric oxygen are observed in the EPR spectrum of a polymer irradiated in air, or when air is introduced to a polymer irradiated in a vacuum. Carbonization and oxidation of γ-irradiated PVDF were observed in the XPS spectrum. A model for polymer degradation based on correlated G3(MP2) molecular orbital theory electronic structure calculations is described in this report. The presence of HF in the products and a low yield of products with the composition CxFyHz indicate the absence of noticeable thermal destruction of the main polymer chain upon heating to 220°C of both the initial and γ-irradiated PVDF. Although any HF released during the PVDF dehydrofluorination would be toxic, a study of the acute toxicity of γ-irradiated PVDF showed that the polymer does not exhibit toxicity after a single intragastric route of administration to mice.

View Accepted Manuscript (DOE)

Research Organization:: University of Alabama, Tuscaloosa, AL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB); University of Alabama

Grant/Contract Number:: SC0018921

OSTI ID:: 1977298

Journal Information:: Journal of Fluorine Chemistry, Journal Name: Journal of Fluorine Chemistry Journal Issue: C Vol. 251; ISSN 0022-1139

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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Investigation of $$\gamma$$-irradiated polyvinylidene fluoride and its acute toxicity

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References (35)

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