Home > Community > How does a different polymer grip the road better/not wear as fast. Less tightly wound polymers will be more grippy as the road can bite into them better but what, looking at the chemical structure, changes a polymers gripping ability?
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Mutegi Njeru

How does a different polymer grip the road better/not wear as fast. Less tightly wound polymers will be more grippy as the road can bite into them better but what, looking at the chemical structure, changes a polymers gripping ability?

Brian Day  Follow

I’ve wondered that myself. I worked many years ago with a fellow that worked on some of the butyl rubber compounds used to make automotive and motorcycle tires. He was a Formula 1 fan and we were always discussing tire performance on our trips together, in fact, he was my first mentor, working with Ford, GM an Chrysler.

As near I remember, Keith talked about different grades of butyl rubber for different tires, such as car, motorcycle pick-up truck, off-road, transport truck aircraft, etc. These grades all were subject to different levels of sulfur cross-linking and carbon filling, along with other additives. I think, therefore, that a softer tire has less cross-linking and less of some of the “hardening” additives. I think that one of the hardening additives was silica, if I remember correctly. If you look at some of the papers published from the University of Akron in the ’60s or Polysar, (in Canada), you might be able to get more information.

Can anyone else help with this?

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