Active sites deterioration of MgCl2-supported catalyst induced by the electron donor extraction by alkylaluminium

作者：Matsuoka H; Liu BP; Nakatani H; Nishiyama I; Terano M^*

来源：Polymer International, 2002, 51(9): 781-784.

DOI：10.1002/pi.942

• Ziegler-Natta catalyst
• stopped-flow method
• propene polymerization
• internal electron donor
• alkylaluminium

To investigate the role of the internal donor in a Ziegler-Natta catalyst, the nature and existing states of the internal donor were intentionally varied by alkylaluminium treatment before polymerization, and the catalytic properties during propene polymerization were accurately evaluated using the stopped-flow method. A significant decrease in the amount of the remaining internal donor was observed during the initial stage of the extraction. The polymerization results show a gradual decrease in the polymer isotacticity with an increase in the extraction time. These different patterns, as a function of the extraction time, indicate that the amount of the remaining internal donor is not directly related to the isotacticity of the produced polymer.

• 出版日期2002-9