Degradation of poly(2,6-dimethylphenylene oxide) and poly(phenylene sulfide) by gamma radiation

Hill D.J.T., Hunter D.S., Lewis D.A., O'Donnell J.H. and Pomery P.J. (1990). Degradation of poly(2,6-dimethylphenylene oxide) and poly(phenylene sulfide) by gamma radiation. In: Radiation Physics and Chemistry. Fourteenth Australian Institute of Nuclear Science and Engineering Conference on Radiation Chemistry, Sutherland, Aust, (559-563). November 9, 1988-November 11, 1988.

Author Hill D.J.T.
Hunter D.S.
Lewis D.A.
O'Donnell J.H.
Pomery P.J.
Title of paper Degradation of poly(2,6-dimethylphenylene oxide) and poly(phenylene sulfide) by gamma radiation
Conference name Fourteenth Australian Institute of Nuclear Science and Engineering Conference on Radiation Chemistry
Conference location Sutherland, Aust
Conference dates November 9, 1988-November 11, 1988
Proceedings title Radiation Physics and Chemistry
Journal name Radiation Physics and Chemistry
Publication Year 1990
Sub-type Fully published paper
Open Access Status Not yet assessed
ISSN 0146-5724
Volume 36
Issue 4
Start page 559
End page 563
Total pages 5
Language eng
Abstract/Summary Electron spin resonance (ESR) spectroscopy and volatile product analysis have been used to examine the degradation of poly[oxy(2,6-dimethyl-1,4-phenylene)], PPO, and poly(thio-1,4-phenylene), PPS, by γ-radiation. Radiation chemical yields (G-values) for trapped radicals were 0.60 and 0.16 after irradiation at 77K, and 0.33 and 0.04 after irradiation at 300 K, for PPO and PPS, respectively. THe ESR spectra of PPO can be analyzed in terms of PhO·, PhCH· and cyclohexadienyl radicals, whereas PPS contained predominantly photobleachable radical ions. G(H) = 0.08 and G(CH) = 0.015 for PPO irradiated at 300 K; G(H) = 0.03 for PPS. The radicals in PPO indicate main-chain scission of the Ph-O bond and loss of H from CH in equal amounts. The radical ions in PPS decayed without the formation of neutral radicals indicating little bond scission and extremely high radiation resistance, which is confirmed by the low G(R) and G(H) values.
Subjects 3108 Radiation
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Conference Paper
Sub-type: Fully published paper
Collection: Scopus Import - Archived
 
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