Characterization And Synthesis Of High 1,2-Syndiotactic Polybutadiene And Its Blends

The solution of polybutadiene is compounded in hydrogenated gasoline. In this system, s-PB was prepared with a Co(naph)₂-Al (i-Bu)₃-CS₂ catalysts. The effect of monomer ratios and another conditions of polymerization were discussed in detail. With Co-Al-CS₂ addition orders inner-complexation, the conversion of the polybutadiene at 10℃ was 99%. ¹³C-NMR analysis of the polymer indicated a 1,2-linkage contents of 98% and a syndiotactic of 99%; As determined by X-ray, the crystallinity of polymer reaches about 75%.Through Tyndall effect and Polymerization experiments, the relationship was studied between nonaqueous system electroconductivity of single component and muti-component mixed by different ratios of Cobalt catalyst system Co-Al-CS₂ and their concentration in toluene medium at room temperature. Co-Al-CS₂ is a colloidal particle catalyst.