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The magnetic isotope effect and oxygen isotope selection in chain processes of polymer oxidation

✍ Scribed by A.L. Buchachenko; A.V. Fedorov; L.L. Yasina; E.M. Galimov

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
272 KB
Volume
103
Category
Article
ISSN
0009-2614

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✦ Synopsis

Experimental evidence based on the dependence of molecular oxygen isotope enrichment on the oxygen conversion. temperature and kinetic chain length indicate that, in chain processes of polymer oG_lation, the elementary reactions (recombination or disproportionation) of peroxy radicals are responsible for the selection of both 170 and l*O isotopes. The r'0 selection is induced by a magnetic isotope effect and is sensitive to the molecular dynamics, while 180 selection is due to a classical mass-ztependent isotope effect and is much less effective_

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