Table 4. The Modified Compounding Formulation by RCAD Results.

Experiment No.			N6-1	N6-2	N6-3	N6-4	N6-5	N6-6	N6-7	N6-8	N6-9
Rubber	Reclaimed tire rubber	phr	85	85	85	80	80	80	70	70	70
	Virgin NR		15	15	15	20	20	20	30	30	30
Filler	NR powder		30	40	50	30	40	50	30	40	50
	CB (N550)		7.5	7.5	7.5	10	10	10	15	15	15
Curing	Acc. NS		0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8
	ZnO		2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5
	SA		0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3
	S		1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2
Total			142.3	152.3	162.3	144.8	154.8	164.8	149.8	159.8	169.8
Mechanical Properties	TS	MPa	6.8	6.6	5.8	6.9	6.2	6.0	7.6	7.0	6.1
	EB	%	268	267	251	292	283	267	335	311	284
	M50	MPa	1.2	1.2	1.2	1.1	1.1	1.1	1.0	1.0	1.1
	M100	MPa	2.1	2.1	2.0	1.9	1.9	2.0	1.8	1.8	1.9
	M200	MPa	4.9	4.8	4.5	4.3	4.3	4.3	4.0	4.1	4.1
	Mooney	ML1+4 100°C	33	34.1	66.2	51.3	52.3	59.3	46.8	49.3	51
Cure Characteristics	ML	dM.m	2.97	3.00	3.59	2.48	2.64	3.14	2.43	2.63	2.68
	MH	dM.m	13.26	12.32	12.88	12.84	12.36	12.16	12.64	12	11.02
	MH-ML	dM.m	10.29	9.32	9.29	10.36	9.72	9.02	10.21	9.37	8.34
	tc10	Min	3	2.73	2.85	3.08	3.00	2.92	3.30	3.15	2.77
	tc90	Min	8.15	8.42	8.35	8.45	8.24	8.50	8.57	8.57	8.6
	Curing-index	min−2	19.42	17.57	18.18	18.62	19.08	17.92	18.98	18.45	17.15