Table 2.
Cure characteristics at 160 °C and crosslink densities of NBR composites (Smin—minimum torque, ΔS—torque increase during vulcanization, t02—scorch time, t90—optimal vulcanization time, νt—crosslink density determined in toluene).
| NBR Compound | Smin (dNm) |
Smax (dNm) |
∆S (dNm) |
t02 (min) |
t90 (min) |
νt × 10−5 (mol/cm3) |
|---|---|---|---|---|---|---|
| 0HAP | 0.6 ± 0.2 | 7.9 ± 0.2 | 7.3 ± 0.2 | 0.9 ± 0.2 | 16 ± 1 | 10.9 ± 0.2 |
| 10HAP | 0.7 ± 0.1 | 9.1 ± 0.1 | 8.4 ± 0.1 | 1.8 ± 0.2 | 28 ± 1 | 11.3 ± 0.3 |
| 30HAP | 0.8 ± 0.2 | 11.6 ± 0.2 | 10.8 ± 0.2 | 1.9 ± 0.2 | 28 ± 1 | 11.5 ± 0.2 |
| 30HAP/APTES | 0.8 ± 0.2 | 15.0 ± 0.2 | 14.2 ± 0.2 | 1.5 ± 0.2 | 27 ± 1 | 12.8 ± 0.4 |
| 30HAP/DmiBr | 1.5 ± 0.1 | 18.1 ± 0.1 | 16.6 ± 0.1 | 0.4 ± 0.2 | 3 ± 1 | 18.9 ± 0.3 |
| 30HAP/CTAB | 1.3 ± 0.2 | 17.5 ± 0.2 | 16.2 ± 0.2 | 0.4 ± 0.2 | 4 ± 1 | 18.3 ± 0.4 |