Composite | NBR1 | NBR2 | NBR3 | NBR4 | NBR5 | NBR6 | NBR7 | NBR8 | NBR9 |
CCB/Ni amounts (phr) | 15/15 | 25/25 | 30/30 | 30/0 | 50/0 | 60/0 | 0/30 | 0/50 | 0/60 |