Effect of lubricating oil on thermal aging of nitrile rubber
| Autor: | Rui Yang, Rossana Iervolino, Jiaohong Zhao, Stellario Barbera, Xuan Liu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010407 polymers
Materials science Polymers and Plastics Chemical structure technology industry and agriculture Base oil Infrared spectroscopy chemistry.chemical_element Thermal aging 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Oxygen 0104 chemical sciences Chemical engineering Natural rubber chemistry Mechanics of Materials visual_art Materials Chemistry visual_art.visual_art_medium Barrier effect 0210 nano-technology Nitrile rubber |
| Zdroj: | Polymer Degradation and Stability. 151:136-143 |
| ISSN: | 0141-3910 |
| DOI: | 10.1016/j.polymdegradstab.2018.03.004 |
| Popis: | Nitrile rubber (NBR) was thermally aged in air, a commercial lubricating oil, and its corresponding base oil. During thermal aging, changes in the volatile components of NBR, including additives from NBR and the commercial lubricating oil, and the chemical structure of NBR, including functional groups and crosslinking density, were studied by using pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS), attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) and time domain nuclear magnetic resonance (TD-NMR). The migration of additives and the degree of oxidation and crosslinking of NBR in different media were compared. Three effects of lubricating oil—a barrier effect, consumption of oxygen, and permeation—on thermal aging of NBR were examined. Base oil protected the rubber from serious oxidation and crosslinking due to the barrier effect and consumption of oxygen. In contrast, the commercial oil accelerated the aging of NBR by extracting and reacting with the additives from NBR and permeating into the rubber to promote oxidation and crosslinking of the rubber chains. The presence of additives in the commercial oil was the main reason for the different performances. These results were meaningful for using NBR products in lubricating oil conditions. |
| Databáze: | OpenAIRE |
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