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

Table 2

Physical properties of rice husk ash (RHA) and silica.

Properties	RHA	Silica
Mean particle size (m)	3.83	0.018
Surface area (m^2/g)	0.91	173
Density (g/cm^3)	2.18	2.10
pH	9.20	6.50