Table 2. The Compounding Formulation and Properties of Revulcanized Rubber without and with Devulcanizer and by Different Devulcanizer.

	N1(no devulcanizer)	N2(Commercial) (China)	N3(GNU developed)
NR powder/g	100	100	1000
EPDM powder/g	0	0	0
Deodorant/g	0	0	0
Commercial(China)	0	0.5	0
GNU developed devulcanizer/g	0	0	0.5
Compounding recipe
Virgin NR/g	105	105	105
Reclaimed EPDM/g	0	0	0
Reclaimed NR/g	90	90	90
ZnO/g	3.75	3.75	3.75
S/g	1.75	1.75	1.75
SA/g	0.5	0.5	0.5
M/g	0	0	0
TMTD/g	0	0	0
NS/g	1.2	1.2	1.2
Vulcanization temperature/°C	145	145	145
Curing time/min		8:21	6:53
Tensile strength/MPa		1.12	5.9
Elongation Strength/%		422	925