Table 1. Formulation of Compounds (unit: phr)

Step	Materials	EV-S8	EV-S10	EV-S12	SEV-S8	SEV-S10	SEV-S12
Stage 1	S-SBR	137.5	137.5	137.5	137.5	137.5	137.5
	Silica	60	60	60	60	60	60
	TESPT	4.8	6.0	7.2	4.8	6.0	7.2
	Zinc oxide	2	2	2	2	2	2
	Stearic acid	3	3	3	3	3	3
Stage 2	Sulfur	0.9	0.9	0.9	1.5	1.5	1.5
	CBS	1	1	1	1	1	1
	DPG	2	2	2	2	2	2
	ZBEC	0.2	0.2	0.2	0.2	0.2	0.2