Domino catalytic system producing branching polythene and use method of the same
A branched polyethylene and catalytic system technology, applied in the field of domino catalytic systems, can solve problems such as expensive cocatalysts, and achieve the effects of cheap synthetic raw materials, reduced production costs, and simple polymerization process
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Embodiment 1
[0032] In a two-necked flask, at room temperature under N 2 Dissolve 0.5 g of β-diketone ligand A with the structure shown in Table 1 in ether solution and add to the solution containing 1.5 ml TiCl 4 Carry out complex coordination in the diethyl ether solution, then heat up to the solvent reflux temperature, reflux for 6 hours, stop the reaction, filter, wash the precipitate with diethyl ether, and vacuum dry at room temperature to obtain the milky white main catalyst A 2 TiCl 2 powder.
[0033] Add 50ml of toluene distilled by reflux of metal sodium into a 250ml three-necked flask that has been replaced three times with nitrogen and twice with ethylene, stir and raise the temperature to 30°C, and add the main catalyst A according to the ratio shown in Table 1 2 TiCl 2 , oligomerization promoter Al(C 2 h 5 ) 3 and co-catalyst MAO, where the molar ratio of oligomerization co-catalyst to main catalyst Al 1 : M=10, the molar ratio of co-catalyst to main catalyst is Al 2 ...
Embodiment 2
[0035] In a two-neck flask, at room temperature N 2 β-diketone ligand A0.52g of the structure shown in Table 1 was dissolved in ether and added to the solution containing 1.5mlTi(OPh) 4 Carry out complex coordination in the diethyl ether solution, then heat up to the solvent reflux temperature, reflux for 6 hours, stop the reaction, filter, wash the precipitate with diethyl ether, and vacuum dry at room temperature to obtain milky white main catalyst A 2 Ti(OPh) 2 powder.
[0036] Add 50ml of toluene distilled by metal sodium reflux to a 250ml three-necked flask that has been replaced three times with nitrogen and twice with ethylene, stir and heat up to 50°C, and add the main catalyst A according to the ratio shown in Table 1 2 Ti(OPh) 2 , oligomerization promoter Al(C 2 h 5 ) 2 Cl and co-catalyst EAO, where the molar ratio of oligomerization co-catalyst to main catalyst Al 1 : M=50, the molar ratio of co-catalyst to main catalyst is Al 2 : M=200, the polymerization r...
Embodiment 3
[0038] In a two-neck flask, at room temperature N 2 Dissolve 0.48 g of β-diketone ligand A with the structure shown in Table 1 in ether and add to the solution containing 2ml of TiCl 4 Carry out complexation and coordination in the diethyl ether solution, then heat up to the solvent reflux temperature, reflux for 6 hours, stop the reaction, filter, wash the precipitate with diethyl ether, and vacuum dry at room temperature to obtain the milky white main catalyst ATiCl 3 powder.
[0039] Add 50ml of toluene distilled by reflux of metal sodium into a 250ml three-necked flask that has been replaced three times with nitrogen and twice with ethylene, stir and raise the temperature to 30°C, and add the main catalyst ATiCl according to the ratio shown in Table 1 3 , oligomerization cocatalyst Al(i-Bu) 3 and co-catalyst BAO, where the molar ratio of oligomerization co-catalyst to main catalyst Al 1 : M=50, the molar ratio of co-catalyst to main catalyst is Al 2 : M=100, the polyme...
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