The effects of γ-radiation on polyacrylonitrile

Hill D.J.T., Lang A.P., O'Donnell J.H. and Pomery P.J. (1992) The effects of γ-radiation on polyacrylonitrile. Polymer Degradation and Stability, 38 3: 193-203. doi:10.1016/0141-3910(92)90114-K

Author Hill D.J.T.
Lang A.P.
O'Donnell J.H.
Pomery P.J.
Title The effects of γ-radiation on polyacrylonitrile
Journal name Polymer Degradation and Stability   Check publisher's open access policy
ISSN 0141-3910
Publication date 1992-01-01
Sub-type Article (original research)
DOI 10.1016/0141-3910(92)90114-K
Volume 38
Issue 3
Start page 193
End page 203
Total pages 11
Subject 1605 Policy and Administration
2507 Polymers and Plastics
Abstract The effect of γ-radiation on polyacrylonitrile has been examined using ESR spectroscopy and through analysis of the changes in molecular weight. The G-values for radical formation of polyacrylonitrile have been calculated at 77 and 300K; G(R·) ≅ 2·8 at 77K and G(R·) ≅ 4·2 at 300K. The ESR spectrum at 300K was assigned primarily to two radicals; one resulting from H abstraction from the methylene group, to form a chain radical, and the other from radical addition to the nitrile group, to form a polyimine radical. These radicals are consistent with a dominant cross-linking reaction. The G-values for cross-linking and scission have been determined at 300K; G(S) ≅ 0·0 and G(X) ≅ 0·59. The cross-linking possibly results from addition of backbone radicals to nitrile groups on adjacent chains.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
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