Clay-enhanced polypropylene intra-autoclave alloy, preparation method for same, and applications thereof
A technology of alloy and polypropylene in a kettle, which is applied to the alloy in a clay reinforced polypropylene kettle and the fields of its preparation and application
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Embodiment 1
[0089] 1) Under vacuum, fill 8g of propylene monomer into the soil load of the reactor, add 50ml of solvent hexane, 3.5ml of heptane solution containing 5.5mmol of cocatalyst triethylaluminum and 0.1g of transition metal catalyst supported by clay (The molar ratio between the aluminum element in the co-catalyst triethylaluminum and the transition metal element titanium in the transition metal catalyst supported by clay is 200:1), the pressure in the kettle is constant at 0.7MPa, and the reaction temperature is 70°C. After 0.5 hours of polymerization reaction, 6.0 g of a composite of homopolymerized isotactic polypropylene containing clay and a weight-average molecular weight of 365,000 g / mol was obtained, and then, the feeding of propylene monomer was stopped;
[0090] 2) 2 g of mixed gas of ethylene and propylene (wherein the molar ratio of ethylene and propylene is 1: 2) is passed into the reaction kettle of step 1), and the reaction is continued for 0.2 hours. The pressure i...
Embodiment 2
[0104] 1) Add 250 grams of liquid propylene into the reactor, and add 0.25 mol of cocatalyst triethylaluminum, 0.05 mol of cocatalyst methylaluminoxane and 1.0 gram of clay-supported transition metal catalyst (triethylaluminum) at 30 ° C. The molar ratio of the aluminum element in the catalyst to the transition metal element titanium in the clay supported transition metal catalyst is 600:1; the molar ratio of the aluminum element in the methyl aluminoxane to the transition metal element zirconium in the catalyst is 2000:1) and hydrogen 0.2 g, the pressure was 3.1MPa, the temperature was raised to 70°C, and the bulk polymerization was carried out for 0.2 hours to obtain 104.28g of a compound containing clay and homoisotactic polypropylene with a weight-average molecular weight of 660,000g / mol, which was directly carried out to the next step.
[0105] 2) Empty the remaining propylene in the reaction kettle in the above step 1) and lower the temperature to 50°C, then feed in a mix...
Embodiment 3
[0121] 1) Add 250 grams of liquid propylene into the reactor, and add 0.15 mol of cocatalyst triethylaluminum and 1.0 gram of clay-supported transition metal catalyst (the aluminum element in the triethylaluminum and the titanium in the clay-supported transition metal catalyst) at 30° C. The mol ratio of element is 400: 1), be warming up to 70 ℃, pressure is 3.1MPa, carry out bulk polymerization reaction 0.5 hour, obtain the composite 133g that contains clay and the homopolyisotactic polypropylene that weight average molecular weight is 785000g / mol, Proceed directly to the next reaction.
[0122] 2) Vent the remaining propylene in the reaction kettle in the above step 1) and lower the temperature to 50°C, then feed 50 grams of ethylene gas and 0.05 g of hydrogen gas, raise the temperature to 90°C, and the pressure is 1.0 MPa to carry out the polymerization reaction 1 Hours, 180.0 g of clay-reinforced polypropylene kettle alloy was finally obtained.
[0123] The clay-reinforce...
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