F-SSBR and SSBR for High Performance Tires: Reinforcement and Dynamic Properties of Silica-Based Tire Tread Compounds

Several generations of solution styrene-butadiene rubbers (SSBR) and functionalized solution styrene-butadiene rubbers (F-SSBR) have been developed to improve the balance between otherwise compromised rolling resistance, traction and wear properties. SSBR with significant composition and microstructural differences are typically designed for high performance tire treads according to the desired end-use application. The selection of an SSBR with optimal glass transition temperature (Tg) plays a key role in achievement of the tire tread compound performance requirements.

Thus, an evaluation focusing on SSBR structure and functionalization, the correlation between their viscoelastic properties, and the reinforcement and dynamic properties of silica-based tire tread compounds was conducted. Several SSBR designed for high performance tires were prepared and evaluated using a standard passenger car radial formulation. We found that both structural and functionalization characteristics show a pronounced impact on dynamic properties, accompanied by increased reinforcement efficiency. The dynamic properties predicted an improved balance of tire tread performance for each end-use application, including excellent low rolling resistance, better wear, and high wet traction.