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Tan Delta

100ºC

30 silica 40 CB

80 silica

50 silica 20 CB

Tan delta is the relationship between the viscous to elastomeric response of the rubber to work input. At high temperatures the lower tan delta shows that improved rolling resistance is expected with the highest silica level stock. It also shows that the additive can improve these results.

STP0260

Page 22 of 25

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