| Autor: |
Takao Tayano, Toshihiko Sugano, Tadashi Takahashi, Hiroshi Nakano, Hideshi Uchino |
| Rok vydání: |
2006 |
| Předmět: |
|
| DOI: |
10.1016/s0167-2991(06)80428-3 |
| Popis: |
Acid treated clay (montmorillonite) was reacted with AlEt3 (TEA) to give TEA-treated montmorillonite (TEA-Montmorillonite). Various amounts of 2,6-dimethylpyridine (26DMP) was added to TEA-Montmorillonite in order to control the acid strength of TEA-Montmorillonite, then the reaction mixture was reacted with triisobutylalummum (TiBA) (0.6 mmol) and 0.3mmol of rac-Me2Si(2-Me-4-Ph-l-lnd)2ZrCl2 (1) to prepare the catalyst. The catalysts were characterized by using solid state UV-vis spectrum spectroscopy. Ethylene polymerizations and propylene-ethylene (1:1 molar ratio) copolymerizations were carried out in heptane at 75 °C-0.8 MPaG for 0.5 h after prepolymerization. The effect of acid strength and propylene prepolymerization on the olefin polymerization behaviors were studied in this catalyst system. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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