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.

UV照射和热降解为苯乙烯-丁二烯橡胶（SBR）和含有的Tinuvin高密度聚（乙烯）（HDPE）的海洋条件进行了研究^® 770受阻胺稳定剂。电子自旋共振成像（ESRI）用于监测各种深度的降解过程，并根据对紫外线辐射的坚固性比较聚合物。另外，通过微观方法研究了氧化降解和机械性能，如红外光谱（IR）和显微压痕硬度测试（MHI），这使我们能够比较材料的局部变化，即在裸露的表面和样品内部。在SBR / Tin770系统，TINUVIN ^®从IR / ATR光谱清楚可见，770稳定剂未能保护聚合物基质免受光氧化。Weather-Ometer（WOM）老化导致不稳定的和稳定的SBR都发生强烈的氧化降解，并在IR / ATR光谱的三个区域引起显着变化。SBR / Tin770系统的微机械性能也显示出强烈的光氧化降解。的局部性质的变化是两个稳定的和非稳定化的样品，证实的Tinuvin的可忽略的稳定效率是相同的（标准偏差内）^®SBR系统中为770。与SBR系统相反，类似的实验表明HDPE / Tin770系统具有非常显着的稳定效果。ESR和2D光谱空间ESRI直接证明了两种类型复合材料的降解行为不同：而在SBR复合材料中，观察到了快速降解，而高密度聚乙烯的降解则慢得多。我们归因这样显着的差异，以チヌビン的变形^®制备SBR橡胶，这显然消除了大部分其保护活性的期间770受阻硫化后胺稳定剂。