Tire traction

Processings and Properties. Polybutadiene is compounded similarly to SBR and vulcanised with sulfur. The high cis-1,4 type crystallizes poorly on stretching so it is not suitable as a "gum" stock but requires carbon black reinforcement. It is generally used for automotive tires in mixtures with SBR and natural mbber. Its low T (—OS " C) makes it an excellent choice for low temperature tire traction, and also leads to a high resilience (better than natural mbber) which ia turn results ia a lower heat build-up. Furthermore, the high i j -polybutadiene also has a high abrasion resistance, a plus for better tire tread wear. 

Rubber Friction and Abrasion in Relation to Tire Traction and Wear... 

Tire traction describes the force transmission between tire and road under aU eventualities. It is the prerequisite for controlled steering, acceleration, and braking of self-propelled vehicles on flat tracks. It finds its upper limit in the frictional force when total sliding occurs. Two aspects have therefore to be considered The mechanics of force transmission of elastic wheels and its relation to rubber friction. 

The chapter concentrates on the aspect of force transmission during limited sliding. The friction contribution to traction and the resulting wear, both in laboratory experiments and in tire traction and... 

FIGURE 26.6 Friction master curve of an acrylate-butadiene rubber (ABR) gum compound on an Alumina 180 wet surface, (a) wetted with distilled water and (b) 5% detergent added to the water. (From Grosch, K.A., The Physics of Tire Traction, Theory and Experiment, Hayes, D.L. and Browne, A.L. (eds.). Plenum Press, New York/London, 1974.)... 

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