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E.s.r. study of free radicals in poly(vinyl carbazole)

Authors
Journal
Polymer
0032-3861
Publisher
Elsevier
Publication Date
Volume
21
Issue
9
Identifiers
DOI: 10.1016/0032-3861(80)90039-7

Abstract

Abstract Poly(N-vinylcarbazole) was γ-irradiated at 77 K. The analysis of e.s.r. spectra showed that cation radicals centred at N were produced in the system. Hyperfine splitting constants are: a N =0.57 mT and a H β =0.68 mT. The dependence of the rate constant of free radical decay on pressure (1–800 MPa) was studied at various temperatures (90–170°C). Activation volumes were determined for two characteristic pressure and temperature ranges. The results of e.s.r. measurements are compared with those obtained from dynamic-mechanical measurements.

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