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- W2085478214 endingPage "1995" @default.
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- W2085478214 abstract "The e.s.r. spectra of u.v.- and γ-irradiated poly-(2,6-dimethylphenylene oxide) in solution and in the solid state have been interpreted in terms of the formation of a dimethylphenoxyl radical (I) as the only major radical. In benzene at room temperature the magnetic parameters for this radical are gav= 2·0047, aMe(I)= 6·2 G, aMe(II)= 5·1 G, and aH(ring)= 1·1 G. In the solid polymer the same radical has effectively isotropic coupling of 5·7 G to the two nearly equivalent methyl groups and g⊥= 2·0024, g∥= 2·0063. At 77 K, after radiolysis in air, the characteristic spectrum of peroxyl-radicals (RO2·) was observed, but irradiation of polymer under vacuum yielded radical (I) together with at least two other radicals. Dipolar interaction between radical pairs has been inferred from the presence of a signal, at g= 4. Radical (I) was present in low concentration even before exposure to radiation, which may mean that it is an intermediate in the synthesis of the polymer." @default.
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- W2085478214 date "1970-01-01" @default.
- W2085478214 modified "2023-09-25" @default.
- W2085478214 title "Unstable intermediates. Part LXXIV. An electron spin resonance study of the optical and radiation damage of poly-(2,6-dimethylphenylene oxide)" @default.
- W2085478214 doi "https://doi.org/10.1039/j19700001995" @default.
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