Table 1. Previous Research Results of ESBR/silica WMB Compound according to the Type of Coagulant¹⁷

Evaluation items	H2SO4	CaCl2
Payne effect (∆G', kPa)	810	790
Mooney viscosity (ML1+4)	107	103
Bound rubber (%)	29.5	36.6
Minimum torque in cure characteristics (N-m)	0.48	0.45
Maximum torque in cure characteristics (N-m)	1.726	1.649
300% modulus (MPa)	7.7	8.2
DIN abrasion loss (mg)	120.5	114
Tan δ at 60°C	0.137	0.129
E” at 0°C (MPa)	6.5	5.1

Formulation: SBR-1712 100 phr, 12wt% TESPT modified silica 89.6 phr, TDAE oil 37.5 phr, ZnO 3 phr, St/A 2 phr, 6PPD 1 phr, Sulfur 1.5 phr, DPG 1.5 phr, CBS 1.5 phr