C NMR study of gamma irradiated polystyrene

C NMR study of gamma irradiated polystyrene

The [sup.13]C CP/MAS NMR spectra of polystyrene were recorded for un-irradiated samples and for samples exposed to a 8989 Gy dose of gamma radiation. The most intense peaks of unirradiated sample appear at 145 and 127 ppm and are assigned to non-protonated and protonated aromatic carbons, respective...

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Veröffentlicht in:Studia Universitatis Babeș-Bolyai. Chemia 2011-09, Vol.56 (3), p.129
Hauptverfasser: Pop, Mihaela, Traian, Stefan, Daraban, Liviu, Fechete, Radu
Format: Artikel
Sprache:eng
Schlagworte:
Gamma rays
Polystyrene
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Zusammenfassung:The [sup.13]C CP/MAS NMR spectra of polystyrene were recorded for un-irradiated samples and for samples exposed to a 8989 Gy dose of gamma radiation. The most intense peaks of unirradiated sample appear at 145 and 127 ppm and are assigned to non-protonated and protonated aromatic carbons, respectively. The gamma irradiation leads to an important decay of [T.sub.1[rho]] relaxation time corresponding to aromatic and methylene-methine functional groups. Keywords: Polystyrene, [sup.13]C CP/MAS NMR, [T.sub.1[rho]]
ISSN:1224-7154