Olefin monomer copolymerization method and application thereof
A technology for olefin monomer and copolymerization, which is applied in the field of olefin polymerization and can solve problems such as low catalytic activity
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Embodiment 1
[0032] The polymerization reaction is carried out in a stainless steel jacketed polymerization kettle with a volume of 2L. First, the polymerization kettle is subjected to anhydrous and anaerobic treatment for 1 hour, and then 1L of dry hexane (water content≤10ppm) is added thereto, and then ethylene, Propylene, hydrogen molar ratio 1:4.5:0.015 raw material gas preparation, then add 0.3mmol vanadium-based main catalyst dichloroethoxyvanadyl (VO(OEt)Cl 2 , VX), 6mmol of cocatalyst sesquiethyl aluminum chloride (AQ), 1.5mmol of activator hexachloropropene (HCP). The polymerization reaction was carried out at room temperature. During the reaction, the polymerization reaction pressure was controlled to be constant at 0.5 MPa through the raw material gas filling valve, and the polymerization reaction time was 30 minutes. After the polymerization is completed, the glue solution is released from the bottom pipe of the polymerization kettle, and after being terminated with ethanol, th...
Embodiment 2
[0036] The polymerization conditions are as described in Example 1, the difference is that the addition of AQ is changed to 12mmol, and 35.09g of dry glue is obtained, and the catalyst activity in this example is calculated to be 1.17×10 5 g polymer.(mol -1 of V). The weight-average relative molecular weight of the obtained dry glue is 90,000, the relative molecular weight distribution is 2.7, the propylene content is 47.5%, and the random sequence content is 63.7%.
[0037] Compared with Comparative Example 2, the catalytic activity of the catalyst system was increased by 33.3%.
[0038] Compared with Comparative Example 6, the catalytic activity of the catalyst system increased by 37.6%, the propylene content increased by 21.5%, and the random sequence content increased by 17.1%.
Embodiment 3
[0040] The polymerization conditions are as described in Example 1, the difference is that the addition of AQ is changed to 18mmol, and 41.75g of dry glue is obtained, and the catalyst activity in this example is calculated to be 1.39×10 5 g polymer.(mol -1of V). The weight-average relative molecular weight of the obtained dry glue is 110,000, the relative molecular weight distribution is 3.1, the propylene content is 45.7%, and the random sequence content is 68.2%.
[0041] Compared with Comparative Example 3, the catalytic activity of the catalyst system increased by 77.9%.
[0042] Compared with Comparative Example 6, the catalytic activity of the catalyst system increased by 63.7%, the propylene content increased by 16.9%, and the random sequence content increased by 25.4%.
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