Carbon Black Treadwear Ratings from Laboratory Tests

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Abstract
It has been seen from the above survey that a few of the treadwear predictor correlations have the required accuracy to provide a satisfactory alternative to road testing of tires for the wear performance of carbon blacks, depending on requirements and circumstances. Correlations based on laboratory rubber testing of rubber mixes and tread compounds are to be preferred over those based solely on carbon black colloidal and morphological measurements. In the author's opinion, Cotten and Dannenberg's correlation of treadwear index with Angle Abrasion measurements of 30 phr compounds and heated bound rubber, and Westlinning and Wolff's correlation with rebound resilience, and the Monsanto Rheometer determination of αF are satisfactory in most instances for the prediction of the treadwear index behavior of carbon blacks.

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