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Esr study of radicals trapped in mechanically degraded polystyrene

✍ Scribed by J. Tiňo; M. Čapla; F. Szöcs

Publisher
Elsevier Science
Year
1970
Tongue
English
Weight
205 KB
Volume
6
Category
Article
ISSN
0014-3057

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✦ Synopsis

The ESR spectra obtained from mechanica!ly degraded polystyrene have been ascribed to specific end-and chain-radicals. Studies of a-deuteropolystyrene indicate that, at low temperatures, the end-radicals predominate but, as the temperature is raised, these convert to the chain-type.

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ESR study of H2O− radicals trapped in Y-type zeolites
✍ Antoine Abou-Kaïs; Jacques C. Vedrine 📂 Article 📅 1977 🏛 Elsevier Science 🌐 English ⚖ 304 KB

A new ESR signal has been observed in y-irradiated Y-type zeolite, the Naf ions of which have been exchanged by divalent cations such as Mgzf or Ca\*+. Its ESR parameters are as follows: gt = 2.0065,ga = 2.0060 andgs = 2.0021 k 0.0002 and Ct = 41. C2 = 42.5 and C3 = 73 + 0.5 Oe for hlgY samples andg