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Table 3 Swelling properties/crosslinking densities of rubber vulcanizates

From: Effect of graphene on polar and nonpolar rubber matrices

Samples Qr nc(molcm−3)×103 nt(molcm−3)×103
NBR 2.3 1.3(−) 0.6(−)
NBR-GO-0.1 2.2 1.5 (15.4%) 1.9 (216.7%)
NBR-GO-0.5 2.0 1.9 (46.2%)
NBR-GO-1 1.9 2.4 (84.6%) 2.9 (383.3%)
NBR-rGO-0.1 2.2 1.5 (15.4%) 2.3 (283.3%)
NBR-rGO-0.5 1.9 2.2 (69.2%)
NBR-rGO-1 1.8 2.9 (123.1%) 3.3 (450.0%)
EPDM 2.0 1.5(−) 1.5(−)
EPDM-GO-0.1 1.9 1.6 (6.7%) 2.3 (53.3%)
EPDM-GO-0.5 1.9 1.7 (13.3%)
EPDM-GO-1 1.8 1.9 (26.7%) 3.4 (126.7%)
EPDM-rGO-0.1 1.9 1.7 (13.3%) 2.1 (40.0%)
EPDM-rGO-0.5 1.9 1.8 (20.0%)
EPDM-rGO-1 1.8 2.0 (33.3%) 4.9 (226.7%)
  1. Q r equilibrium swelling degree, Q o swelling degree of unfilled rubber, Q c swelling degree of composites, n c chemical crosslinking density and nt: total network density