Radiation degradation of elastomers

Hill D.J.T., O'Donnell J.H., Senake Perera M.C., Pomery P.J. and Whittaker A.K. (1993) Radiation degradation of elastomers. Journal of Macromolecular Science, Part A, 30 9-10: 633-644. doi:10.1080/10601329308021251


Author Hill D.J.T.
O'Donnell J.H.
Senake Perera M.C.
Pomery P.J.
Whittaker A.K.
Title Radiation degradation of elastomers
Journal name Journal of Macromolecular Science, Part A   Check publisher's open access policy
ISSN 1520-5738
Publication date 1993-09-01
Sub-type Article (original research)
DOI 10.1080/10601329308021251
Volume 30
Issue 9-10
Start page 633
End page 644
Total pages 12
Subject 1600 Chemistry
2503 Ceramics and Composites
2505 Materials Chemistry
2507 Polymers and Plastics
Abstract The dependence on molecular structure of the effects of high energy radiation on a variety of elastomers has been examined by lH- and 13C-NMR spectra in solution, swollen gel, and the solid state. Scission and crosslinking yields obtained for an ethylene-propylene copolymer by NMR were in agreement with values from soluble fraction analysis, showing that the NMR method was quantitative and that the radiation-induced scission and crosslinking events were randomly spatially distributed. High crosslinking yields in cis-1,4-polybutadiene indicated a kinetic chain reaction producing crosslinks in clusters. A variety of new chain ends from main-chain scission were observed in polyisobutylene providing evidence on the validity of proposed radiolysis mechanisms. In chlorobutyl rubber, crosslinking occurred with very high yield by reaction of both C-Cl and C=CH2 groups in the chlorinated isoprene units, but decreased after quite low doses due to depletion of these groups. Copyright
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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