A study of the vacuum gamma-radiolysis of two aromatic polyimide fluoropolymers containing phenylphosphine oxide

Alexander, MA, Hill, DJT, Connell, JW and Watson, KA (2001) A study of the vacuum gamma-radiolysis of two aromatic polyimide fluoropolymers containing phenylphosphine oxide. High Performance Polymers, 13 3: 67-78. doi:10.1088/0954-0083/13/3/301


Author Alexander, MA
Hill, DJT
Connell, JW
Watson, KA
Title A study of the vacuum gamma-radiolysis of two aromatic polyimide fluoropolymers containing phenylphosphine oxide
Journal name High Performance Polymers   Check publisher's open access policy
ISSN 0954-0083
Publication date 2001
Sub-type Article (original research)
DOI 10.1088/0954-0083/13/3/301
Volume 13
Issue 3
Start page 67
End page 78
Total pages 12
Place of publication United Kingdom
Publisher IOP Publishing Ltd
Collection year 2001
Language eng
Subject C1
250599 Macromolecular Chemistry not elsewhere classified
780103 Chemical sciences
Abstract The vacuum gamma -radiolysis of two fluorinated polyimides containing phenylphosphine oxide units, TOR-RC and TOR-RC ODPA, have been studied at 77 K and 300 K. The phenyl phosphine oxide units provide protection of the polymers towards oxidation by oxygen atoms and the bulky fluoromethyl groups reduce the colouration of the polymers by limiting donor-acceptor complex formation through the aromatic units. At 77 K the radicals formed were identified to be a mixture of neutral radicals (60%) and anion radicals. At 300 K only neutral radicals were found. The G-values for radical formation were found to be 0.50 and 0.42 at 77 K and 0.051 and 0.052 at 300 K for TOR-RC and TOR-RC ODPA, respectively. Little change was observed in the visible spectra of the polyimides following vacuum radiolysis at 300 K up to a dose of 3.3 MGy, and the polymers were shown to undergo net cross linking with a gel dose of 0.45 MGy.
Keyword Polymer Science
Radiation Degradation
Poly(arylene
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemistry and Molecular Biosciences
 
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Created: Tue, 14 Aug 2007, 15:28:01 EST