Citation
Brown P. S., . and Tinker A. J., . High damping NR/epoxidised NR blends. pp. 90-101. ISSN 0127-7065
Abstract
High damping blends possessing good physical properties are obtained when a lightly filled NR compound is blended with a heavily filled and plasticised epoxidised natural rubber (ENR) compound. The use of a polar plasticiser ensures that the plasticiser is distributed in favour of the more polar ENR phase. Damping is found to vary with the black distribution being favoured by a large difference between the loading in each phase. The level of damping increases with the proportion of the ENR component in the blend but the other physical properties worsen. Recovery properties are poor for all blends except those vulcanised by using an efficient vulcanisation cure system. The high level of damping that these materials possess results from the high filler and plasticiser loading in the ENR phase however the relatively high Tg of this component influences how the properties vary with changing temperature. The dynamic loss peak at 5 Hz lies just below 0C for blends based on ENR-50 and at about -31C for the blends containing ENR-25. A marked stiffening accompanies this glass transition limiting the operating range of the materials. ENR-50 based blends give higher damping but have more temperature dependent properties when compared to their ENR-25 analogs.
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Abstract
High damping blends possessing good physical properties are obtained when a lightly filled NR compound is blended with a heavily filled and plasticised epoxidised natural rubber (ENR) compound. The use of a polar plasticiser ensures that the plasticiser is distributed in favour of the more polar ENR phase. Damping is found to vary with the black distribution being favoured by a large difference between the loading in each phase. The level of damping increases with the proportion of the ENR component in the blend but the other physical properties worsen. Recovery properties are poor for all blends except those vulcanised by using an efficient vulcanisation cure system. The high level of damping that these materials possess results from the high filler and plasticiser loading in the ENR phase however the relatively high Tg of this component influences how the properties vary with changing temperature. The dynamic loss peak at 5 Hz lies just below 0C for blends based on ENR-50 and at about -31C for the blends containing ENR-25. A marked stiffening accompanies this glass transition limiting the operating range of the materials. ENR-50 based blends give higher damping but have more temperature dependent properties when compared to their ENR-25 analogs.
Additional Metadata
| Item Type: | Article |
|---|---|
| AGROVOC Term: | Natural rubber |
| AGROVOC Term: | Rubber |
| AGROVOC Term: | Epoxides |
| AGROVOC Term: | Epoxy compounds |
| AGROVOC Term: | Physical properties |
| AGROVOC Term: | Vulcanization |
| AGROVOC Term: | Blending |
| AGROVOC Term: | Drying |
| AGROVOC Term: | Polymers |
| AGROVOC Term: | Carbon black |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 24 Apr 2025 06:28 |
| URI: | http://webagris.upm.edu.my/id/eprint/23339 |
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