Thermomechanical properties of zirconium tungstate/hydrogenated nitrile butadiene rubber (HNBR) composites for low-temperature applications
| Autor: | A. Tiwari, Anton Akulichev, Ben Alcock, Andreas T. Echtermeyer |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Nitrile Negative Thermal Expansion FOS: Physical sciences Compression set 02 engineering and technology 010402 general chemistry 01 natural sciences Thermal expansion Thermomechanical properties chemistry.chemical_compound Elastomer composites Negative thermal expansion Natural rubber General Materials Science Composite material Condensed Matter - Materials Science Bulk modulus Mechanical Engineering Materials Science (cond-mat.mtrl-sci) Zirconium tungstate HNBR 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Mechanics of Materials visual_art visual_art.visual_art_medium 0210 nano-technology Glass transition |
| Zdroj: | Journal of Materials Science |
| ISSN: | 1573-4803 0022-2461 |
| Popis: | Rubber compounds for pressure sealing application typically have inferior dimensional stability with temperature fluctuations compared with their steel counterparts. This effect may result in seal leakage failures when subjected to decreases in temperature. Composites of hydrogenated nitrile butadiene rubber (HNBR) and zirconium tungstate as a negative thermal expansion filler were prepared in order to control the thermal expansivity of the material. The amount of zirconium tungstate (ZrW2O8) was varied in the range of 0 to about 40 vol%. The coefficient of thermal expansion (CTE), bulk modulus, uniaxial extension and compression set properties were measured. The CTE of the ZrW2O8-filled HNBR decreases with the filler content and it is reduced by a factor of 2 at the highest filler concentration used. The filler effect on CTE is found to be stronger when HNBR is below the glass transition temperature. The experimental thermal expansion data of the composites are compared with the theoretical estimates and predictions given by FEA. The effect of ZrW2O8 on the mechanical characteristics and compression set of these materials is also discussed. This is a post-peer-review, pre-copyedit version of an article published in [Journal of Materials Science]. The final authenticated version is available online at: https://link.springer.com/article/10.1007%2Fs10853-016-0236-6 |
| Databáze: | OpenAIRE |
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