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Citation: Dong-ho LEE, Kwang-soo KIM. Propylene Polymerization by TiCl₄ Supported on Mg(OEt)₂ Activating with Ethanol/CO₂ System[J]. Chinese Journal of Applied Chemistry, ;2001, 18(5): 310-315. shu

Propylene Polymerization by TiCl₄ Supported on Mg(OEt)₂ Activating with Ethanol/CO₂ System

1.
Department of Polymer Science, Kyungpook University, Taegu 702-701, Korea

Received Date: 20 January 2001
Available Online: 20 March 2001

In the preparation of catalyst for propylene polymerization, the Mg(OEt)₂ support was activated with ethanol/CO₂ system followed by solidification, and treated with TiCl₄ in the presence of ethylbenzoate as an internal donor (ID). The chemical compositions of the activated support and the prepared catalyst were examined in detail. During the dissolution of Mg(OEt)₂ support in ethanol medium with CO₂ bubbling, the structure of support changed to magnesium hydrocarbyl carbonate, (CH₃CH₂O)_2-x Mg(O(C=O)OCH₂CH₃)_x (x=1,2). The content of carbonated CO₂ in the activated support was dependent on the heat treatment in the solidification of support. In the preparation procedure of polymerization catalyst, the activated support was treated with TiCl₄ so that the structure of support was converted to MgCl₂ with the incorporation of ID. The polymerization behavior of the prepared catalyst was also studied in the presence of phenyltriethoxysilane as an external donor.
- propylene polymerization,
- TiCl₄ supported catalyst,
- Mg(OEt)₂,
- activation
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Propylene Polymerization by TiCl₄ Supported on Mg(OEt)₂ Activating with Ethanol/CO₂ System