Propene Polymerisation with rac-[Me2Si(2-Me-4-(α-naphthyl)-1-Ind)2]ZrCl2 as a Highly Active Catalyst: Influence of Monomer Concentration, Polymerisation Temperature and a Heterogenising Support
✍ Scribed by Marco Frediani; Walter Kaminsky
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 215 KB
- Volume
- 204
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Abstract
Propene was polymerised at high temperatures (up to 90 °C) using rac‐[Me~2~Si(2‐Me‐4‐(α‐naphthyl)‐1‐Ind)~2~]ZrCl~2~/MAO as the catalytic system. The increasing deactivation reaction rate of the catalyst for polymerisations above 60 °C was less for a silica supported catalyst compared with the homogeneous one. The isotacticity of polypropene decreases from 99 to 96%. Also the morphology changes with different temperatures.
Increasing of the thermal stability for the rac‐[Me~2~Si(2‐Me‐4‐(α‐naphthyl)‐1‐Ind)~2~]ZrCl~2~/MAO/SiO~2~ with respect of the rac‐[Me~2~Si(2‐Me‐4‐(α‐naphthyl)‐1‐Ind)~2~]ZrCl~2~/MAO system.
magnified imageIncreasing of the thermal stability for the rac‐[Me~2~Si(2‐Me‐4‐(α‐naphthyl)‐1‐Ind)~2~]ZrCl~2~/MAO/SiO~2~ with respect of the rac‐[Me~2~Si(2‐Me‐4‐(α‐naphthyl)‐1‐Ind)~2~]ZrCl~2~/MAO system.