. 2016 Apr 21;19(4):251–256. doi: 10.1007/s40477-016-0204-7

Table 2.

SoS and Z calculation for different rubbers and formulations. S1 and S2 indicate different samples

Material		SoS [m/s]	ρ [kg/m³]	Z [MRayl]
Pure EF	S1	973.6	1063	1.03
Pure EF	S2	971.8	1063	1.03
EF + 10 % C₃H₈O₃	S1	996.5	1092	1.09
EF + 10 % C₃H₈O₃	S2	993.0	1088	1.08
EF + 30 % C₃H₈O₃	S1	1055.1	1134	1.20
EF + 30 % C₃H₈O₃	S2	1041.0	1131	1.20
EF + 30 % C₃H₈O₃ + 4 % Al₂O₃	S1	1062.9	1135	1.22
EF + 30 % C₃H₈O₃ + 4 % Al₂O₃	S2	1073.9	1156	1.24
EF + 10 % detergent	S1	993.9	1058	1.05
EF + 10 % detergent	S2	993.1	1063	1.06
EF + 20 % detergent	S1	1030.4	1062	1.09
EF + 20 % detergent	S2	1029.4	1059	1.09
EF + 30 % detergent	S1	1064.1	1049	1.12
EF + 30 % detergent	S2	1075.0	1048	1.13
EF + 1 % steel	S1	961.9	1104	1.06
EF + 1 % steel	S2	955.6	1081	1.03
EF + 2 % Al₂O₃	S1	986.2	1094	1.08
EF + 2 % Al₂O₃	S2	996.7	1089	1.09
EF + 4 % Al₂O₃	S1	978.9	1109	1.09
EF + 4 % Al₂O₃	S2	977.2	1111	1.09
EF + 8 % Al₂O₃	S1	968.1	1161	1.12
EF + 8 % Al₂O₃	S2	975.5	1139	1.11
Pure DSM	S1	983.7	1084	1.07
Pure DSM	S2	977.8	1091	1.07
DSM + 10 % N-propanol + 5 % graphene	S1	982.3	1070	1.05
DSM + 10 % N-propanol + 5 % graphene	S2	981.2	1073	1.05
DSM + 30 % N-propanol + 5 % graphene	S1	1020.2	972	0.99
DSM + 30 % N-propanol + 5 % graphene	S2	1017.0	976	0.99
Pure PU	S1	1397.9	1016	1.42
Pure PU	S2	1397.4	1016	1.42
Pu + Si	S1	1230.7	1032	1.27
Pu + Si	S2	1213.9	1022	1.27