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Photomechanical degradation of thermoplastic elastomers
Rubber Technology Centre, Indian Institute of Technology, Kharagpur 721302, India.
Rubber Technology Centre, Indian Institute of Technology, Kharagpur 721302, India.
Rubber Technology Centre, Indian Institute of Technology, Kharagpur 721302, India.
School of Mechanical and Systems Engineering, School of Chemical Engineering and Advanced Materials, University of Newcastle Upon Tyne, Newcastle upon Tyne, NE1 7RU, United Kingdom.
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2006 (English)In: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 99, no 1, 150-161 p.Article in journal (Refereed) Published
Abstract [en]

The photodegradation of thermoplastic elastomers designed for outdoor applications was studied with laboratory ultraviolet (UV) exposure in the unstrained state and under tensile strain (25 and 50%). Strained exposure caused a reduction of the strain to failure in subsequent tensile tests. For some combinations of material and exposure conditions, some recovery of extensibility occurred between 2 and 4 weeks. Microscopic examination revealed that this was probably due to embrittlement of the surface region that was sufficiently severe that surface cracks did not prop agate into the interior and that the observed recovery did not correspond to repair or improvement of the material. Shielding the sample surface from UV irradiation reduced the formation of surface cracking very significantly, and it was deduced that the principal cause of degradation was photooxidation rather than ozone attack. © 2005 Wiley Periodicals, Inc.

Place, publisher, year, edition, pages
2006. Vol. 99, no 1, 150-161 p.
Keyword [en]
Degradation, Elastomers, Thermoplastics
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-50315DOI: 10.1002/app.21913OAI: oai:DiVA.org:liu-50315DiVA: diva2:271211
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-12

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