Table 1. The Composition of As-prepared Samples
| Samples | SBR(phr) | TEOS(phr) | CBS(phr) | DD(phr) | zinc oxide(phr) | stearic acid (phr) | sulfur(phr) | silane coupling agents (g) |
| (A) | 100 | 0 | 2 | 0.5 | 3 | 2 | 1.75 | -- |
| (B) | 100 | 20 | 2 | 0.5 | 3 | 2 | 1.75 | -- |
| (C) | 100 | 30 | 2 | 0.5 | 3 | 2 | 1.75 | -- |
| (D) | 100 | 40 | 2 | 0.5 | 3 | 2 | 1.75 | -- |
| (E) | 100 | 50 | 2 | 0.5 | 3 | 2 | 1.75 | -- |
| (F) | 100 | 60 | 2 | 0.5 | 3 | 2 | 1.75 | -- |
| (G) | 100 | 50 | 2 | 0.5 | 3 | 2 | 1.75 | 4 |
| (H) | 100 | 50 | 2 | 0.5 | 3 | 2 | 1.75 | 4 |
| (I) | 100 | 50 | 2 | 0.5 | 3 | 2 | 1.75 | 4 |
phr: part per hundred of rubber.
CBS: N-cyclohexyl-2-benzothiazolyl sulfonamide. DD: 2,2’-dibenzothiazolyl disulfide.