| 摘要 |
PURPOSE:To prepare a syndiotactic polystyrene by polymerizing a styrenic monomer without using aluminoxane which is expensive and need be used in a large amount. CONSTITUTION:A syndiotactic polystyrene is prepd. efficiently at a low cost without using aluminoxane by polymerizing a styrenic monomer in the presence of a catalyst comprising pentamethylcyclopentadienyltitanium trimethoxide, 1,1'-dimethylferrocenium tetra(pentafluorophenyl)borate, and triisobutylaluminum.
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