Abstract
High cis-polybutadienes(poly BD) are widely used in the industrial field such as materials for tire or golf ball.High cis-poly BD prepared from Ziegler-type catalyst system are effective to take a cis configuration in high levels, however, the molecular weight distributions (Mw/Mn) of obtained poly BDs are fairly broad. Poly BD having both narrow Mw/Mn and high cis configuration levels are desirable for the purpose of better abrasion resistance, higher resilience and lower heat build-up, and so on.Recently, the new polybutadiene rubbers polymerized by Nd catalyst (Nd-poly BD) has been developed. Nd-poly BDs have higher 1, 4-cis bond content, lower 1, 2-vinyl bond content, narrower Mw/Mn and higher linearity than the conventional Ziegler-type Ti, Co or Ni catalyzed poly BD.Evaluation on polybutadiene only and carbon black system for tire application was carried out. Nd-poly BD showed better processability, lower hysteresis loss and higher abrasion resistance. Furthermore, evaluation on golf ball formulation was carried out. Nd-poly BD had the potential of higher resilience property than Ni catalyzed poly BD from the results of lower tanδ value at -20°C. These results indicate that Nd-poly BD is a much for industrial application such as tire, golf ball and so on.
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