Table 1. Formulations of Test Sample Compounds

	Compositions
	SBR	Stearic acid	CBSa	DDb	Zinc oxide	Silica	Cell. hybrid	Starch hybrid	Sulfur
	(phrc)	(phr)	(phr)	(phr)	(phr)	(phr)	(phr)	(phr)	(phr)
Neat	100	2	2	0.5	3	0	0	0	1.75
Star.hybrid 5	100	2	2	0.5	3	0	0	5	1.75
Star.hybrid 10	100	2	2	0.5	3	0	0	10	1.75
Cell.hybrid 5	100	2	2	0.5	3	0	5	0	1.75
Cell.hybrid 10	100	2	2	0.5	3	0	10	0	1.75
Silica 5	100	2	2	0.5	3	5	0	0	1.75

N-Cyclohexyl-2-benzothiazole-sulfonamide,
2,2-Dibenzothiazolyl disulfide,
phr, part per hundreds of rubber.