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Título : Effects of ozone in surface modification and thermal stability of SEBS block copolymers
Autor : Peinado, Carmen, Corrales, Teresa, Catalina, Fernando, Pedron, Sara, Ruiz Santa Quiteria, Valentin, Parellada, María Dolores, Barrio, Juan Antonio, Olmos, Dania, Gonzalez-Benito, Javier
Palabras clave : Thermoplastic elastomers
Block copolymers
Block copolymers
Orderedisorder transition
Ozone
Degradation
Chemiluminescence
Fecha de publicación : 2010
Editor: Elsevier
Citación : Polymer Degradation and Stability 95 (6) : 975–986 (2010)
Resumen: 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
Versión del editor: http://dx.doi.org/10.1016/j.polymdegradstab.2010.03.018
URI : http://hdl.handle.net/10261/58032
ISSN: 0141-3910
DOI: 10.1016/j.polymdegradstab.2010.03.018
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