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Lookup NU author(s): Jonathan Heslop, Emeritus Professor Jim White
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The photodegradation of a new family of thermoplastic elastomers, based on blends of natural rubber and polyethylene, was studied with laboratory ultraviolet exposures in the unstrained state and under tensile strain (25 and 50%). Strained exposure caused reduction of the strain to failure in subsequent tensile tests. The blends were more resistant to degradation than the natural rubber homopolymer. The introduction of crosslinks (at a low concentration so that the thermoplastic nature of the blends was retained) changed the resistance to photo-oxidation. Two different crosslinking systems were used. When dicumyl peroxide was used as the crosslinking agent, the resistance to degradation was reduced, whereas the compound containing a sulfur curing system showed improved resistance to photodegradation. Photo-oxidation rather than ozone degradation was found to be the major cause of breakdown, even with samples held in tension. © 2002 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 86.
Author(s): Heslop J; White JR; Bhowmick AK
Publication type: Article
Publication status: Published
Journal: Journal of Applied Polymer Science
Year: 2002
Volume: 86
Issue: 10
Pages: 2393-2402
ISSN (print): 0021-8995
ISSN (electronic): 1097-4628
Publisher: John Wiley & Sons, Inc
URL: http://dx.doi.org/10.1002/app.10831
DOI: 10.1002/app.10831
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