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Closed Access item Effects of ozone in surface modification and thermal stability of SEBS block copolymers

Authors:Peinado, Carmen
Corrales, Teresa
Catalina, Fernando
Pedron, Sara
Ruiz Santa Quiteria, Valentin
Parellada, María Dolores
Barrio, Juan Antonio
Olmos, Dania
Gonzalez-Benito, Javier
Keywords:Thermoplastic elastomers, Block copolymers, Block copolymers, Orderedisorder transition, Ozone, Degradation, Chemiluminescence
Issue Date:2010
Publisher:Elsevier
Citation:Polymer Degradation and Stability 95 (6) : 975–986 (2010)
Abstract:SEBS block copolymers were treated under mild conditions in an ozone atmosphere, producing very slightly chemically-modified surfaces. The thermal stability was analysed by chemiluminescence and related to morphological changes observed by AFM. The intrinsic thermal stability was diminished by ozone exposure, but the oxidation induction times were delayed which indicates an enhancement of thermal stability under oxidative conditions. Also, chemiluminescence analysis showed the presence of a typical orderedisorder transition at temperatures around 120 C. Two different sets of samples which showed different morphological patterns were imaged by AFM. The effects of micro-domain separation and inter-domain structure on thermal properties are discussed and explained by a coarsening of the internal interface induced by ozone. A detailed 2D Fourier transformed analysis of AFM images allowed us to identify a regular wrinkled nano-pattern induced by uniaxial strain combined with ozone treatment, offering new opportunities in applications ranging from organic electronics to bio-pattern
Publisher version (URL):http://dx.doi.org/10.1016/j.polymdegradstab.2010.03.018
URI:http://hdl.handle.net/10261/58032
ISSN:0141-3910
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