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UV degradation of styrene-butadiene rubber versus high density poly(ethylene) in marine conditions studied by infrared spectroscopy, micro indentation, and electron spin resonance imaging
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SYSNO ASEP 0492766 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title UV degradation of styrene-butadiene rubber versus high density poly(ethylene) in marine conditions studied by infrared spectroscopy, micro indentation, and electron spin resonance imaging Author(s) Šlouf, Miroslav (UMCH-V) RID, ORCID
Pilař, Jan (UMCH-V) RID, ORCID
Dybal, Jiří (UMCH-V) RID, ORCID
Šloufová, I. (CZ)
Michálková, Danuše (UMCH-V)
Lukešová, Miroslava (UMCH-V) RID, ORCID
Zgadzai, O. (IL)
Blank, A. (IL)
Filippov, Sergey K. (UMCH-V) RID, ORCID, SAISource Title Polymer Degradation and Stability. - : Elsevier - ISSN 0141-3910
Roč. 156, October (2018), s. 132-143Number of pages 12 s. Language eng - English Country NL - Netherlands Keywords styrene-butadiene rubber ; high density poly(ethylene) ; electron spin resonance imaging Subject RIV CD - Macromolecular Chemistry OECD category Polymer science R&D Projects 8G15018 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) NV15-31269A GA MZd - Ministry of Health (MZ) LO1507 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UMCH-V - RVO:61389013 UT WOS 000448091400013 EID SCOPUS 85052496109 DOI 10.1016/j.polymdegradstab.2018.08.005 Annotation UV irradiation and thermal degradation were studied in marine conditions for styrene-butadiene rubber (SBR) and high density poly (ethylene) (HDPE) containing a Tinuvin® 770 hindered amine stabilizer. Electron spin resonance imaging (ESRI) was used to monitor degradation process in various depths and compare the polymers in terms of robustness to UV irradiation. In addition, both oxidative degradation and mechanical properties were studied by microscale methods, such as infrared microspectroscopy (IR) and microindentation hardness testing (MHI), enabling us to compare the material changes locally, i.e. both at the exposed surfaces and inside the samples. In SBR/Tin770 system, Tinuvin®770 stabilizer failed to protect the polymer matrix against photooxidation as clearly seen from IR/ATR spectra. The Weather-Ometer (WOM) aging resulted in strong oxidative degradation of both non-stabilized and stabilized SBR and caused remarkable changes in three regions of IR/ATR spectra. The strong photooxidative degradation was also manifested through the micromechanical properties of SBR/Tin770 systems. The change of the local properties was the same (within the standard deviations) for both stabilized and non-stabilized samples, which confirmed negligible stabilization efficiency of Tinuvin® 770 in the SBR system. In contrast to the SBR systems, similar experiments showed very dramatic stabilization effects in the HDPE/Tin770 system. ESR and 2D spectral-spatial ESRI directly proved the different degradation behavior of the two types of the composites: whereas in the SBR composites fast degradation was observed, high density poly (ethylene) showed much slower degradation. We attributed such striking difference to the modification of Tinuvin® 770 hindered amine stabilizer after vulcanization during preparation of SBR rubber, which apparently eliminated most of its protective activity. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2019
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