DYNAMIC PROPERTIES OF BATCH POLYMERIZED SSBR BASED COMPOUNDS

Dynamic properties of compounds based on carbon black or precipitated silica and SSBRs produced via batch solution polymerization have been analyzed as a function of polymers structures and compared to countert ypes from continuous polymerization. Dynamic spectra of such compounds indicate a better wet grip/rolling resistance balance for batch polym erized SSBRs. Tan delta values measured performing strain sweeps in sh ear at a low frequency have been used as indicators for rolling resist ance. E '' and G '' values obtained respectively in compression at a h igh frequency and in shear from master curves have been used to predic t wet grip.