Table 1. Formulation of the Compounds (phr)
| Unit: phr | NR / BR blend | ENR-25 / BR blend | ENR-50 / BR blend |
| N_35 | N_20 | E25_35 | E20 | E0 | E50_35 | E50_20 | E50_0 |
| NR | 70 | 70 | 0 | 0 | 0 | 0 | 0 | 0 |
| ENR-25 | 0 | 0 | 70 | 70 | 70 | 0 | 0 | 0 |
| ENR-50 | 0 | 0 | 0 | 0 | 0 | 70 | 70 | 70 |
| BR | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 |
| Carbon black | 35 | 20 | 35 | 20 | 0 | 35 | 20 | 0 |
| Silica | 20 | 30 | 20 | 35 | 55 | 20 | 35 | 55 |
| TESPT1) | 1.6 | 2.8 | 1.6 | 2.8 | 4.4 | 1.6 | 2.8 | 4.4 |
| DPG | 0.384 | 0.672 | 0.384 | 0.672 | 1.056 | 0.384 | 0.672 | 1.056 |
| TDAE oil | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| ZnO | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Stearic acid | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| 6PPD | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| TMQ | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Sulfur | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 |
| TBBS | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 |
| PVI | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
The amount of silane coupling agents was calculated as 8 wt% of the weight of silica.