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The effect of antioxidants on the surface oxidation and surface cracking of crosslinked polydimethylsiloxane
KTH, Superseded Departments, Polymer Technology.
2001 (English)In: Polymer degradation and stability, ISSN 0141-3910, E-ISSN 1873-2321, Vol. 74, no 1, 49-57 p.Article in journal (Refereed) Published
Abstract [en]

Crosslinked polydimethylsiloxanes with three different chain-breaking antioxidants (Irganox 1076, Irganox 565 and Tinuvin 770) were exposed to air plasma (GHz), and the surface structures of the exposed samples were assessed by contact angle measurements, X-ray photoelectron spectroscopy, optical and scanning electron microscopy, and surface profilometry before and after uniaxial stretching. It was found that samples containing antioxidants oxidized more slowly than the reference sample with no antioxidant. Higher doses of air plasma were required to form a brittle silica-like layer in the samples with antioxidant than in the reference sample with no antioxidant. Tinuvin 770 showed the strongest antioxidative effect whereas Irganox 1076 and Irganox 565 were similar in efficiency.

Place, publisher, year, edition, pages
2001. Vol. 74, no 1, 49-57 p.
Keyword [en]
polydimethylsiloxane, surface oxidation, antioxidant, surface cracking, hydrophobic recovery, silicone-rubber, hydrophobicity, recovery, insulation
URN: urn:nbn:se:kth:diva-20977ISI: 000171263200005OAI: diva2:339674
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Gedde, Ulf W.
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