Radical formation on gamma-radiolysis of poly [(methacrylic acid)-co-acrylonitri

Fox, Peter A., Hill, David J.T., Lang, Anthony P. and Pomery, Peter J. (2003) Radical formation on gamma-radiolysis of poly [(methacrylic acid)-co-acrylonitri. Polymer International, 52 11: 1719-1724. doi:10.1002/pi.1298

Author Fox, Peter A.
Hill, David J.T.
Lang, Anthony P.
Pomery, Peter J.
Title Radical formation on gamma-radiolysis of poly [(methacrylic acid)-co-acrylonitri
Journal name Polymer International   Check publisher's open access policy
ISSN 0959-8103
Publication date 2003-11
Sub-type Article (original research)
DOI 10.1002/pi.1298
Volume 52
Issue 11
Start page 1719
End page 1724
Total pages 6
Place of publication United Kingdom
Publisher John Wiley
Collection year 2003
Language eng
Subject C1
250502 Physical Chemistry of Macromolecules
780103 Chemical sciences
Abstract The radicals formed on gamma-radiolysis of a series of copolymers of methacrylic acid and acrylonitrile have been investigated by ESR spectroscopy. This series of copolymers spanned the full composition range and the study was carried out at 77 K and ambient temperature. The radicals formed in the copolymers at 77 and 303 K were found to be similar to those found in the two homopolymers, but in the intermediate composition range the presence of acrylonitrile propagation radicals was also detected. These radicals were not observed to be formed in significant quantities on the radiolysis of polyacrylonitrile. They are believed to result from a scission of the main chain at methacrylic acid/acrylonitrile diad sequences following loss of the methacrylic acid carboxyl group. At 77 K, the copolymers with high methacrylic acid contents were found to be more sensitive to radical formation than the methacrylic acid homopolymer, but this enhanced sensitivity was not evident at ambient temperature, where the G-values for radical formation for the copolymers were slightly less than the values for the homopolymers. (C) 2003 Society of Chemical Industry.
Keyword Polymer Science
Poly [(methacrylic Acid) -co-acrylonitrile]
Esr Spectra
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
2004 Higher Education Research Data Collection
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Created: Wed, 15 Aug 2007, 01:51:35 EST