Catalyst composition for long-chain alpha-olefin polymerization and method for catalyzing long-chain alpha-olefin polymerization by catalyst composition
A technology of olefin polymerization and catalyst, which is applied in the field of catalysts for olefin polymerization, and can solve the problems of poor thermal stability and high molecular weight of catalyzed long-chain α-olefins
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Embodiment 1
[0054] The 100ml three-necked reaction flask was evacuated, replaced three times with nitrogen, and 8.3mg (10μmol) of complex 2, 15ml of 1-decene, 0.8ml of methylaluminoxane (MAO) (1.53mol / l toluene solution) were added successively. , 0.5ml of diethylzinc (1.0mol / l toluene solution), the polymerization reaction was stopped after 2 hours at 90°C, and the reaction system was black and viscous. The reaction was terminated with a dilute hydrochloric acid-ethanol solution, the obtained polymer was dissolved in tetrahydrofuran, and precipitated with methanol. This was repeated three times. Finally, the sample was placed in a vacuum drying oven for drying for 24 hours to obtain 3.10 g of a white solid polymer with a certain elasticity. . The catalytic efficiency of the catalytic system is 310 kg mol -1 Ni, the weight-average molecular weight of the polymer measured at the end of the reaction was Mw=256,200, and the molecular weight distribution was Mw / Mn=2.41.
Embodiment 2
[0064] The 100ml three-necked reaction flask was evacuated, replaced three times with nitrogen, and 8.3mg (10μmol) of complex 2, 15ml of 1-decene, 0.8ml of methylaluminoxane (MAO) (1.53mol / l toluene solution) were added successively. , 1.0ml of diethylzinc (1.0mol / l toluene solution), the polymerization reaction was stopped after 2 hours at 90°C, and the reaction system was black and viscous. The reaction was terminated with a dilute hydrochloric acid-ethanol solution, the obtained polymer was dissolved in tetrahydrofuran, and precipitated with methanol. This was repeated three times. Finally, the sample was placed in a vacuum drying oven for drying for 24 hours to obtain 3.64 g of a white solid polymer with a certain elasticity. . The catalytic efficiency of the catalytic system is 364 kg mol -1 Ni, the weight-average molecular weight of the polymer measured at the end of the reaction was Mw=142,400, and the molecular weight distribution was Mw / Mn=2.07.
Embodiment 3
[0066] The 100ml three-necked reaction flask was evacuated, replaced three times with nitrogen, and 8.3mg (10μmol) of complex 2, 15ml of 1-decene, 0.8ml of methylaluminoxane (MAO) (1.53mol / l toluene solution) were added successively. , 2.0ml of diethylzinc (1.0mol / l toluene solution), the polymerization reaction was stopped after 2 hours at 90°C, and the reaction system was black and viscous. The reaction was terminated with a dilute hydrochloric acid-ethanol solution, the obtained polymer was dissolved in tetrahydrofuran, and precipitated with methanol. This was repeated three times. Finally, the sample was placed in a vacuum drying oven to dry for 24 hours to obtain 1.92 g of a polymer with certain elasticity. The catalytic efficiency of the catalytic system is 192 kgmol -1 Ni, the weight-average molecular weight of the polymer measured at the end of the reaction was Mw=86,400, and the molecular weight distribution was Mw / Mn=2.27.
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