A comparative study of the effects of UV- and gamma-radiation on copolymers of acrylonitrile/butadiene

Cardona, F., Hill, D. T., Pomery, P. and Whittaker, A. K. (1999) A comparative study of the effects of UV- and gamma-radiation on copolymers of acrylonitrile/butadiene. Polymer International, 48 10: 985-992.


Author Cardona, F.
Hill, D. T.
Pomery, P.
Whittaker, A. K.
Title A comparative study of the effects of UV- and gamma-radiation on copolymers of acrylonitrile/butadiene
Journal name Polymer International   Check publisher's open access policy
Publication date 1999
Sub-type Article
DOI 10.1002/(SICI)1097-0126(199910)48:10<985::AID-PI258>3.3.CO;2-V
Volume number 48
Issue number 10
ISSN 0959-8103
Start page 985
End page 992
Total pages 8
Place of publication Sussex, UK
Publisher John Wiley & Sons
Collection year 1999
Language eng
Subject C1
250502 Physical Chemistry of Macromolecules
780103 Chemical sciences
Abstract The radiolysis of nitrile rubbers with different acrylonitrile/butadiene composition and the homopolymers, poly(butadiene) (PBD) and poly(acrylonitrile) (PAN) has been investigated and compared with the photolysis of the same polymers. A significantly different mechanism of degradation was found for the two types of radiation. The results obtained by ESR, FTIR and measurements of soluble fractions of irradiated samples, indicated that the acrylonitrile units of the nitrile rubbers are more sensitive units to gamma-radiation, with the effects of irradiation increasing with the acrylonitrile content. The reactions observed were consumption of double bonds, crosslinking, and cyclization with the formation of conjugated double bonds. No chain-scission reactions were detected. In contrast to gamma-irradiation, the effects of photolysis were centred at the butadiene units, and increases in the acrylonitrile content resulted in a proportional decrease in the sensitivity of the copolymers. Crosslinking and chain scission were identified as the main effects of photolysis of NBR rubbers. (C) 1999 Society of Chemical Industry.
Keyword Polymer Science
Nitrile Rubbers
Copolymers
Radiolysis
Photolysis
Thermal-degradation
Polyacrylonitrile
Photooxidation
Rubber
Q-Index Code C1

Document type: Journal Article
Sub-type: Article
Collection: Centre for Advanced Imaging Publications
 
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