METHOD OF PRODUCING OLEFIN POLYMER

To provide a method of separately producing olefin polymers having different long chain branch degrees by a simple method, or to provide a simple method of producing an olefin polymer having a different long chain branch degree.SOLUTION: A method includes: controlling a partial pressure of a gaseous olefin within a range of 0.9-6 MPa (a gauge pressure) in the presence of a catalyst for polymerizing olefin containing a specific transition metal complex. When the partial pressure is increased, an olefin polymer having a low long chain branch degree is easy to be obtained, and when the partial pressure is reduced, an olefin polymer having a high long chain branch degree is easy to be obtained.SELECTED DRAWING: None 【課題】長鎖分岐度の異なるオレフィン重合体を、簡便な方法で作り分ける方法を提供すること。あるいは、長鎖分岐度の異なるオレフィン重合体を製造する簡便な方法を提供すること。【解決手段】特定の遷移金属錯体を含むオレフィン重合用触媒の存在下、ガス状オレフィンの分圧を０．９～６ＭＰａ（ゲージ圧）の範囲で制御する方法。前記分圧を高めると長鎖分岐度が少ないオレフィン重合体が得られ易く、前記分圧を低いと長鎖分岐度が高いオレフィン重合体が得られ易い。【選択図】なし