[1F08-12] Polymer, oligomer(3)

[1F09] Polymerization of conjugated diene by catalytic systems combining rare-earth amides and pyridine derivatives.

○Kento Shibuta¹, Daisuke Takeuchi¹, Shigenaga Takano² (1. Hirosaki University, 2. Bridgestone Corp.)

Herein we report that catalytic systems combining rare-earth metal amide and nitrogen-containing ligand such as dihydroxybipyridine, triisobutylaluminum, and trityl bolate promote polymerization of isoprene to give polyisoprene with highly cis-1,4 microstructure. In particular, high cis-1,4-selective polymerization could be achieved when dihydroxybipyridine and neodymium amide were used. Polymerization using similar pyridine derivatives and various rare-earth metal amides was also investigated.

Keywords:conjugated diene, cis-1,4 selective polymerization, rare-earth metal