Influence of crosslinker and water on mechanical properties of carboxylated nitrile butadiene rubber (XNBR)
| Autor: | Florian Arbeiter, Santhosh Ayalur-Karunakaran, Sandra Schlögl, Armin Holzner, Wolfgang Kern, Doris Darya Fleischmann, Raimund Schaller |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Nitrile Carboxylic acid Organic Chemistry Ionic bonding 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering Natural rubber Covalent bond visual_art Ultimate tensile strength medicine visual_art.visual_art_medium Molecule Swelling medicine.symptom 0210 nano-technology |
| Zdroj: | Polymer Testing. 66:24-31 |
| ISSN: | 0142-9418 |
| Popis: | Carboxylated nitrile butadiene rubber (XNBR) belongs to the group of ionomers as it comprises ionizable carboxylic acid groups. Its molecular structure enables to pursue several crosslinking routes, resulting in the formation of either covalent or ionic bonds. This study focuses on the effect of ionic and covalent crosslinking on the structure and mechanical properties of XNBR. Furthermore, the effect of water on mechanical properties (tensile tests, stress-rupture tests) is assessed as a function of exposure time in water for swollen and de-swollen samples. The network density shows a good correlation with the swelling degree and mechanical behavior obtained from tensile tests. The results reveal that the introduction of covalent bonds restricts ionic rearrangement processes and is crucial for static durability in water. |
| Databáze: | OpenAIRE |
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