Multiple Glass transition temperaturesof terpolymers of Isoprene for tire tread

It well known in the Tire Industries that passenger tire treads use blends of two or three elastomers to obtain balanced tire performance properties. In the use of  this type of polymer blends  tire technologist usually becomes aware of  polymer miscibility and phase separation as well as filler distribution.

We have by novel polymer synthetic procedures and use of two or three monomers ,and understanding the reactivity ratios of each monomer were able to micro-engineer the structural features enabling introduction of multiple Glass-Transition Temperatures that circumvent the problems of miscibility and filler distribution.

In this paper we will show that by the use of three monomers, such as styrene/Isoprene/butadiene we were able to prepare a ter-polymer (SIBR) that produced the desired tread rubber properties without sacrificing the basic tire tread performance.More details will be discussed during the oral presentation.