Research Article
Properties of Vulcanized Polyisoprene Rubber Composites Filled with Opalized White Tuff and Precipitated Silica
Table 6
Mechanical properties of NR/PS and NR/OWT rubber composites.
| | Sample | NR/PSi | NR/OWT | Tensile strength
(MPa) | Elongation
at break (%) | Hardness (°ShA) | Resilience (%) | Tear strength
(N/mm) | Modulus at 200%
elongation (MPa) | Modulus at 300%
elongation
(MPa) | Compression set (%)
22 h/100°C |
| | 1 | 100/50 | — | 14.6 | 530 | 66 | 58 | 78.9 | 4.46 | 6.9 | 39.3 | | 2 | — | 100/20 | 15.7 | 720 | 21.3 | 56 | 56 | 2.45 | 3.4 | 31 | | 3 | — | 100/40 | 15.4 | 660 | 58 | 54 | 77.1 | 3.1 | 4.6 | 30 | | 4 | — | 100/50 | 13.8 | 640 | 60 | 56 | 79.3 | 3.2 | 5.1 | 30 | | 5 | — | 100/60 | 14.1 | 645 | 62 | 50 | 80.6 | 3.4 | 4.4 | 36.6 |
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