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Mooney Viscosity

80 phr silica 2+1

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Sheared

The standard low shear rate rubber viscosity test shows both high viscosity and a viscosity that changes with time. The rapid change in viscosity on storage is thought to be caused by increasing in filler-filler interactions. With some shear induced (ML 1+4) work this interactions is broken. The process additive helps decrease the viscosity changes during storage and gives a lower viscosity compound.

STP0260

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