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Table 2 Cure properties of filled and unfilled NBR and EPDM at 160 °C

From: Effect of graphene on polar and nonpolar rubber matrices

Composites MH(dNm) ML(dNm) ΔM(dNm) t90(min) tS2(min) CRI(min−1)
aNBR 29.4(−) 3.8(−) 25.6(−) 10.5(−) 2.3(−) 12.2(−)
aNBR-GO-0.1 29.5 (0.3%) 3.8(−) 26.7 (4.6%) 14.3 (36.2%) 2.4 (4.3%) 8.4(−31.1%)
aNBR-GO-0.5 35.5 (20.7%) 3.4(−10.5%) 32.1 (25.4%) 5.5(−47.6%) 3.1 (34.8%) 41.7 (241.8%)
aNBR-GO-1 37.6 (27.9%) 3.5(−7.9%) 34.1 (33.2%) 6.2(−41.0%) 3.9 (69.6%) 43.5 (256.6%)
aNBR-rGO-0.1 42.1 (43.2%) 3.7(−2.6%) 38.4 (50.0%) 4.5(−57.1%) 2.6 (13.0%) 52.6 (331.1%)
aNBR-rGO-0.5 38.2 (29.9%) 3.3(−13.2%) 34.9 (36.3%) 4.4(−58.1%) 2.7 (17.4%) 58.8 (382.0%)
aNBR-rGO-1 39.8 (35.4%) 3.6(−5.3%) 36.2 (41.4%) 4.3(−59.0%) 2.6 (13.0%) 58.8 (382.0%)
EPDM 46.7(−) 3.8(−) 42.9(−) 16.7(−) 6.8(−) 10.1(−)
EPDM-GO-0.1 48.7 (4.3%) 4.3 (13.2%) 44.4 (3.5%) 18.2 (9.0%) 6.6(−2.9%) 8.6(−14.9%)
EPDM-GO-0.5 48.9 (4.7%) 4.6 (21.1%) 44.3 (3.3%) 19.0 (13.8%) 7.3 (7.4%) 8.5(−15.8%)
EPDM-GO-1 49.0 (4.9%) 4.9 (28.9%) 44.1 (2.8%) 24.2 (44.9%) 7.5 (10.3%) 6.0(−40.6%)
EPDM-rGO-0.1 49.0 (4.9%) 4.2 (10.5%) 44.8 (4.4%) 16.0(−4.2%) 6.0(−11.8%) 10.0(−1.0%)
EPDM-rGO-0.5 50.6 (8.4%) 4.8 (26.3%) 45.8 (6.8%) 15.0(−10.2%) 5.2(−23.5%) 10.2 (1.0%)
EPDM-rGO-1 50.0 (7.1%) 4.9 (28.9%) 45.1 (5.1%) 18.0 (7.8%) 6.4(−5.9%) 8.6(−14.9%)
  1. NB the data MH: maximum torque, M L minimum torque, ΔM change in torque (MH-ML), t 90 optimum cure time, t s2 minimum cure time, CRI cure rate index (100/(t90-ts2)) for the aNBR-GO/rGO compounds were recalled from our earlier work (Mensah et al., 2014) for comparison