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Compound ingredients for different ratios of PBO.
| Sample | Ratio of PBO | NO (phr) | AO (phr) |
| NO 1 | 100:0 | 10 | 0 |
| NO 2 | 70:30 | 7 | 3 |
| NO 3 | 50:50 | 5 | 5 |
| NO 4 | 30:70 | 3 | 7 |
| Sample | Ratio of PBO | LMO (phr) | AO (phr) |
| LMO 1 | 100:0 | 10 | 0 |
| LMO 2 | 70:30 | 7 | 3 |
| LMO 3 | 50:50 | 5 | 5 |
| LMO 4 | 30:70 | 3 | 7 |
| Sample | Ratio of PBO | PO (phr) | AO (phr) |
| PO 1 | 100:0 | 10 | 0 |
| PO 2 | 70:30 | 7 | 3 |
| PO 3 | 50:50 | 5 | 5 |
| PO 4 | 30:70 | 3 | 7 |
phr = parts per hundred of rubber.
