| 摘要 |
PURPOSE: A method for preparing an olefin and a polypropylene resin prepared by the method are provided, to improve the stiffness, the impact resistance and the heat resistance of a polyolefin. CONSTITUTION: The method comprises the steps of surface treating a solid titanium catalyst for polymerization of olefin with a silane compound having at least two vinyl groups; and total polymerizing an olefin monomer and at least one diene compound selected from the group consisting of 1,3-butadiene, 1,5-hexadiene, 1,7-octadiene, 1,9-decadiene and 1,13-tetradecadiene, by using the surface-treated solid titanium catalyst. Preferably the solid titanium catalyst is prepared by dissolving a magnesium compound having no reducing property into an electron donor to prepare a magnesium compound solution; reacting the magnesium compound solution with a transition metal compound, a silicon compound, a tin compound or their mixtures to precipitate solid particles; and reacting the precipitated particles with a titanium compound and an electron donor.
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