Influence of Filler from a Renewable Resource and Silane Coupling Agent on the Properties of Epoxidized Natural Rubber Vulcanizates

Table 1

Compounding formulation.

Ingredients	Gum	RHA10	RHA10-Si69	RHA20	RHA20-Si69	RHA30	RHA30-Si69	S30	S30-Si69
ENR-25	100	100	100	100	100	100	100	100	100
ZnO	5	5	5	5	5	5	5	5	5
Stearic acid	1	1	1	1	1	1	1	1	1
Wingstay-L	1	1	1	1	1	1	1	1	1
TBBS	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6
Sulfur	2	2	2	2	2	2	2	2	2
RHA	—	10	10	20	20	30	30	—	—
Silica^a	—	—	—	—	—	—	—	30	30
TESPT	—	—	0.01	—	0.02	—	0.03	—	2.4
DPG	—	—	0.003	—	0.005	—	0.008	—	0.3

Silica (Ultrasil 7000 GR).