Towards identifying the new structures formed on the gamma-radiolysis of Ultem

David Brereton, Sheila Devasahayam, David J. T. Hill, Andrew K. Whittaker

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Ultem irradiated up to 10.0 MGy has been analysed using C-13, H-1 and D-2 proton-carbon and proton-proton correlation NMR spectroscopy to shed light on the formation of new structures. Chemical shifts and correlation data were used to determine the structure or partial structures of several new components. The spectra indicated the presence of new groups and structures involving the isopropylidene group, the imide ring, and hydrogen-abstraction reactions. Possible pathways for formation of the new structures are proposed and the G-values for their formation have been estimated. (C) 2003 Elsevier Science Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)65-77
Number of pages13
JournalRadiation Physics and Chemistry
Volume69
Issue number1
DOIs
Publication statusPublished - Jan 2004
Externally publishedYes

Keywords

  • Ultem
  • gamma-radiolysis
  • NMR
  • partial structures
  • RADIATION-CHEMISTRY
  • SPECTROSCOPY
  • POLYETHERIMIDES
  • POLYCARBONATE
  • SENSITIVITY
  • BISPHENOL
  • ESR

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