| 摘要 |
Catalyst systems, processes of forming the same and polymers formed therefrom are described herein. The processes of forming the catalyst systems generally include contacting a blend of an alkyl magnesium compound and an organoaluminum compound with an alcohol to form a magnesium dialkoxide compound; contacting the magnesium dialkoxide compound with a first agent to form a solution of reaction product "A", the first agent including a halogenating/titanating agent; contacting the solution of reaction product "A" with a second agent to form a solid reaction product "B", the second agent including a blend of a first metal halide and a metal alkoxide; contacting the solid reaction product "B" with a third agent to form a solid reaction product "C", the third agent including a second metal halide; contacting the solid reaction product "C" with a fourth agent to form a solid reaction product "D", the fourth agent including a third metal halide; contacting the solid reaction product "D" with a fifth agent to form a catalyst component, the fifth agent including a reducing agent; and heating an intermediate selected from reaction product "A", reaction product "B", reaction product "C", reaction product "D" and combinations thereof to form a heat-treated catalyst that results in a shear response and a molecular weight distribution for a polymer produced by the heat-treated catalyst that are greater than a shear response and a molecular weight distribution for a polymer produced by an identical non-heat-treated catalyst.
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