A compound, a catalyst, an olefin polymer and a method for producing the same

Abstract

The application discloses a compound, a catalyst, an olefin polymer and a preparation method thereof. The structure of the application is shown in formula (I): wherein, Ar is independently selected from substituted or unsubstituted azobenzene. The application synthesizes a new compound, and the compound has photoresponsiveness. When the catalyst prepared by using the compound as a ligand is irradiated by ultraviolet light, the azobenzene group in the molecule undergoes cis-trans isomerization, the change of the catalyst property is caused, and the change of the polymerization result is caused, namely, the same catalyst of the application realizes the preparation of polyethylene with different molecular weights, and the polyethylene catalyst for regulating the structure of polyethylene by light is successfully prepared.

Description

Technical Field

[0001] This invention relates to the field of catalysts, and more specifically, to a compound, a catalyst, an olefin polymer, and a method for preparing the same. Background Technology

[0002] Polyethylene (PE) is the most produced general-purpose synthetic resin, with products including low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), medium-density polyethylene (MDPE), and high-density polyethylene (HDPE). Due to its low price and superior mechanical properties, it is widely used in various fields.

[0003] Polyethylene is produced through the transition metal-catalyzed polymerization of ethylene. The development of high-performance transition metal catalysts is a major driving force in this field. Most research over the past few decades has focused on the discovery of novel catalyst structures, including new metal centers and new ligand structures. The main goals of catalyst development are to improve conversion, enhance functional group tolerance, and increase catalyst selectivity. Once the metal center and ligands of the catalyst are selected, these properties are largely fixed.

[0004] Stimulus-responsive groups are functional groups that can sense external stimuli such as light, heat, electricity, and magnetism and respond rapidly, thereby altering the physical or chemical properties (shape, solubility, interfacial properties, self-assembly, etc.) of a compound. Introducing stimulus-responsive groups into post-transition metal catalysts allows for the regulation of catalyst performance using external stimuli. In their paper "Redox-Active Ligands: An Advanced Tool To Modulate Polyethylene Microstructure," Long et al. introduced redox-active groups into a nickel diimine catalyst. By adding a reducing agent during polymerization, they altered the catalyst's structure, thus regulating the branching degree of polyethylene. After in-situ addition of the reducing agent, the branching degree of polyethylene changed by up to 30%.

[0005] Among various stimuli, light is an ideal source due to its non-invasiveness and versatility. Most common research focuses on using light to either initiate or accelerate reactions. Recent studies have concentrated on obtaining two different reaction outcomes using the same transition metal catalyst, determining which product is formed by irradiating with light by switching on the light source, changing its wavelength, or altering its intensity. However, research in this area is still limited.

[0006] Therefore, there is a need to develop new photoresponsive compounds and catalysts. Summary of the Invention

[0007] To address the problems in existing technologies, this invention proposes a compound, a catalyst, an olefin polymer, and a method for their preparation. This invention synthesizes a novel compound exhibiting photoresponsiveness. When used as a ligand, the catalyst prepared from this compound undergoes cis-trans isomerization of the azophenyl group in its molecule under ultraviolet light irradiation, causing changes in the catalyst's properties and thus altering the polymerization results. Specifically, the same catalyst of this invention can produce polyethylene with different molecular weights. This invention successfully prepares a polyethylene catalyst whose polyethylene structure can be controlled by light.

[0008] One object of the present invention is to provide a compound having the structure shown in formula (I):

[0009]

[0010] Ar is independently selected from substituted or unsubstituted azophenyl groups.

[0011] In the compounds described in this invention, preferably,

[0012] The Ar is selected from the following structures:

[0013]

[0014] R1 and R2 are each independently selected from hydrogen or alkyl groups;

[0015] Preferably, the alkyl group is a C1-C10 alkyl group; more preferably, it is a C1-C5 alkyl group; even more preferably, it is a C1-C3 alkyl group; and most preferably, it is a methyl group.

[0016] In the compounds described in this invention, preferably,

[0017] In formula (I), the two Ars are selected from the same substituents; preferably, the compound is

[0018]

[0019] or

[0020]

[0021] A second objective of this invention is to provide a method for preparing the compound described in one of the objectives of this invention, comprising the following steps:

[0022] Under the action of a catalyst, the compound shown in formula (II) and the compound shown in formula (III) react in a solvent to give the compound shown in formula (I);

[0023] The structure of compound (II) is as follows:

[0024]

[0025] The structure of compound (III) is as follows:

[0026]

[0027] The R1 and R2 mentioned above correspond to the R1 and R2 in the compound described in one of the objectives of this invention, that is, R1 and R2 are each independently selected from hydrogen or alkyl groups.

[0028] Preferably, the alkyl group is a C1-C10 alkyl group; more preferably, it is a C1-C5 alkyl group; even more preferably, it is a C1-C3 alkyl group; and most preferably, it is a methyl group.

[0029] In the method for preparing the compound described in this invention, preferably,

[0030] The catalyst is selected from organic acids, preferably formic acid or acetic acid; and / or,

[0031] The solvent is selected from alcohols, preferably methanol or ethanol; and / or,

[0032] The molar ratio of the compound of formula (II) to the compound of formula (III) is 1:2 to 1:4; and / or,

[0033] The molar ratio of the compound of formula (II) to the catalyst is 30:1 to 15:1; and / or,

[0034] The molar ratio of the compound of formula (II) to the solvent is 1:150 to 1:400; preferably 1:200 to 1:300.

[0035] In the method for preparing the compound described in this invention, preferably,

[0036] The reaction temperature is 15℃~35℃; and / or,

[0037] The reaction time is 3 to 6 days; and / or,

[0038] The reaction includes a post-processing step, which includes filtration, washing, and drying.

[0039] Preferably,

[0040] The reaction temperature is 20℃~30℃; and / or,

[0041] The reaction time is 4 to 5 days; and / or,

[0042] The washing solvent is selected from at least one of methanol, ethanol, or isopropanol; and / or,

[0043] The washing process is performed 3 to 5 times.

[0044] A third objective of this invention is to provide a catalyst, which is a complex and has the following structural formula:

[0045]

[0046] Wherein, Ar corresponds to the Ar in the compound described in one of the objectives of this invention, that is, Ar is selected from the following structures:

[0047]

[0048] R1 and R2 are each independently selected from hydrogen or alkyl groups;

[0049] Preferably, the alkyl group is a C1-C10 alkyl group; more preferably, it is a C1-C5 alkyl group; even more preferably, it is a C1-C3 alkyl group; and most preferably, it is a methyl group.

[0050] M is a metallic element, and X is an anion.

[0051] The catalyst of this invention contains a symmetrical azophenyl group, which has two isomers: a thermodynamically stable trans isomer and a metastable cis isomer. The trans isomer can be converted to the cis isomer under ultraviolet light irradiation. The cis isomer can revert to the trans isomer under visible light irradiation. The cis and trans structures have different steric hindrance and electronic effects, thereby giving the metal center different catalytic activities, achieving photocontrolled activity and a polyethylene structure.

[0052] In the catalyst described in this invention, preferably,

[0053] The M is selected from Ni or Pd; and / or,

[0054] X is a halide ion; preferably a bromide ion.

[0055] Preferably,

[0056] The catalyst is

[0057]

[0058] or

[0059]

[0060] The fourth objective of this invention is to provide a method for preparing the catalyst described in the third objective of this invention, comprising the following steps:

[0061] The catalyst was prepared by reacting the compound shown in formula (Ⅰ) with a metal salt in a solvent;

[0062] The compound represented by formula (Ⅰ) is selected from the compounds described in one of the objectives of this invention.

[0063] In the method for preparing the catalyst described in this invention, preferably,

[0064] The metal salt is selected from nickel dimethyl ether glycol bromide ((DME)NiBr2), palladium dichloride (1,5-cyclooctadiene); and / or,

[0065] The solvent is selected from chlorinated hydrocarbons, preferably dichloromethane; and / or,

[0066] The molar ratio of the metal salt to the compound shown in formula (I) is 2:1 to 1:1; preferably 1.5:1 to 1:1; and / or,

[0067] The molar ratio of the metal salt to the solvent is 1:400 to 1:800; preferably 1:500 to 1:700.

[0068] In the method for preparing the catalyst described in this invention, preferably,

[0069] The reaction temperature is 15℃~40℃; and / or,

[0070] The reaction time is 10–24 hours; and / or,

[0071] Preferably,

[0072] The reaction temperature is 20℃~30℃; and / or,

[0073] The reaction time is 12–18 hours.

[0074] In the method for preparing the catalyst described in this invention, preferably,

[0075] The reaction is followed by a post-processing step, which includes filtration, washing, and drying; preferably, the washing is performed 3 to 5 times; and / or,

[0076] In this invention, the solvent used for washing can be selected from commonly used solvents, preferably dichloromethane.

[0077] The fifth objective of this invention is to provide a method for olefin polymerization, comprising the following steps:

[0078] An olefin polymer is prepared by polymerizing a catalyst, a co-catalyst, and an olefin in a solvent.

[0079] The catalyst is selected from at least one of the catalysts described in objective three of this invention and the catalysts prepared by the method described in objective four of this invention.

[0080] In the olefin polymerization method described in this invention, preferably,

[0081] It also includes a triethylaluminum (TEA) hexane solution, the purpose of which is to remove impurities that affect polymerization; those skilled in the art can add it according to the conventional dosage as needed, preferably 0.5 mL / L to 3 mL / L of triethylaluminum (TEA) hexane solution / solvent; more preferably, the molar concentration of the triethylaluminum (TEA) hexane solution is 1 mol / L.

[0082] In the olefin polymerization method described in this invention, preferably,

[0083] The cocatalyst is selected from aluminumoxanes; and / or,

[0084] The olefin is selected from C2-C10 olefins; and / or,

[0085] The solvent is selected from alkanes, aromatics, and halogenated hydrocarbons; and / or,

[0086] Preferably,

[0087] The aluminum oxane is selected from at least one of methylaluminoxane, ethylaluminoxane, and isobutylaluminoxane; and / or,

[0088] The olefin is selected from at least one of ethylene, propylene, butene, pentene, hexene, octene, and 4-methyl-1-pentene; and / or,

[0089] The solvent is selected from at least one of hexaalkyl, pentane, heptane, benzene, toluene, dichloromethane, chloroform, and dichloroethane.

[0090] In the olefin polymerization method described in this invention, commonly used polymerization conditions can be employed. Preferably,

[0091] The molar ratio of the catalyst to the co-catalyst is 1:(20-2000), wherein the molar amount of the catalyst is based on the total molar amount of the metal therein; and / or,

[0092] The concentration of the catalyst in the polymerization system is 1×10⁻⁶. -8 mol / L ~ 1×10 -3 moles per liter, where the concentration of the catalyst is expressed as the total molar concentration of the metals contained therein;

[0093] Preferably,

[0094] The molar ratio of the catalyst to the co-catalyst is 1:(50-1000); and / or,

[0095] The concentration of the catalyst in the polymerization system is 1×10⁻⁶. -8 mol / L ~ 1×10 -5 Moles per liter.

[0096] In the olefin polymerization method described in this invention, preferably,

[0097] The polymerization reaction is carried out at a temperature of -78°C to 100°C; and / or,

[0098] The polymerization reaction takes 0.5 to 3 hours; and / or,

[0099] The polymerization reaction is carried out at a pressure of 0.01–10.0 MPa.

[0100] Preferably,

[0101] The polymerization reaction is carried out at a temperature of 0°C to 30°C; and / or,

[0102] The polymerization reaction takes 1–2 hours; and / or,

[0103] The polymerization reaction is carried out at a pressure of 0.01–2.0 MPa.

[0104] The sixth objective of this invention is to provide an olefin polymer prepared by the olefin polymerization method described in the fifth objective of this invention;

[0105] Preferably, the molecular weight of the olefin polymer is 1×10⁻⁶. 4 -15×10 4 The molecular weight distribution coefficient is 1.5-4.

[0106] The endpoints and any values ​​of the ranges disclosed in this invention are not limited to the precise ranges or values; these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein. In the following, various technical solutions can, in principle, be combined with each other to obtain new technical solutions, which should also be considered as specifically disclosed herein.

[0107] Compared with the prior art, the present invention has the following beneficial effects:

[0108] 1. This invention prepares a novel photoresponsive compound in which the azophenyl group in the molecule undergoes cis-trans isomerization under 365nm and 420nm light irradiation, causing changes in the properties of the catalyst. The cis-trans isomerization of the azophenyl group is rapid and reversible.

[0109] 2. The compounds of the present invention have a symmetrical structure. When used to prepare catalysts, the same catalyst produces polyethylene with different molecular weights and molecular weight distributions under light and non-light conditions during olefin polymerization. Attached Figure Description

[0110] Figure 1 The spectrum of coordination compound 1 under ultraviolet light irradiation at a wavelength of 365 nm is shown.

[0111] Figure 2 The spectrum of coordination compound 1 under visible light irradiation at a wavelength of 420 nm is shown.

[0112] Figure 3 For coordination compound 1 1 H NMR spectrum;

[0113] Figure 4 For coordination compound 2 1 H NMR spectrum.

[0114] Explanation of reference numerals in the attached figures:

[0115] Figure 1 In the diagram, 1- refers to the absorption curve of coordination compound 1 before irradiation with light at a wavelength of 365 nm; 2- refers to the absorption curve of coordination compound 1 after irradiation with light at a wavelength of 365 nm.

[0116] Figure 2 In the figure, 3- refers to the absorption curve of coordination compound 1 after irradiation with light at a wavelength of 420 nm; 2- refers to the absorption curve of coordination compound 1 after irradiation with light at a wavelength of 365 nm. Detailed Implementation

[0117] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that the following embodiments are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the content of the present invention are still within the scope of protection of the present invention.

[0118] It should also be noted that the various specific technical features described in the following embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the various possible combinations will not be described separately in this invention.

[0119] Furthermore, various embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention. The resulting technical solutions are part of the original disclosure of this specification and also fall within the protection scope of the present invention.

[0120] Unless otherwise specified, the raw materials used in the examples and comparative examples are all disclosed in the prior art, such as those that can be directly purchased or prepared according to the preparation methods disclosed in the prior art.

[0121] Test method:

[0122] Polymer molecular weight (M)w ) and molecular weight distribution (M w / M n Characterization: Molecular weight and its distribution were determined by gel permeation chromatography (GPC) using a Waters Alliance GPCV 2000 instrument. The solvent was 1,2,4-trichlorobenzene, the sample concentration was 1 mg / mL, the solvent flow rate was 1.0 mL / min, and the measurement temperature was 150 °C. Each sample was measured twice.

[0123] Example 1

[0124] Synthesis of Compound 1: In a 250 mL round-bottom flask, 4-aminoazobenzene (5.92 g, 30.0 mmol), 2,3-butanedione (1.32 mL, 15.0 mmol), formic acid (0.06 mL, 1.26 mmol), and methanol (120 mL) were added. After stirring at room temperature for 4 days, the resulting solid was collected by vacuum filtration, washed three times with methanol, and then dried in a vacuum oven to obtain an orange-red solid, Imine-1 (4.01 g, 60% yield). The solid did not require purification and was directly used in the next reaction.

[0125] Synthesis of coordination compound 1 (catalyst): In a 100 mL round-bottom flask, Imine-1 (0.44 g, 1.0 mmol), (DME)NiBr2 (0.31 g, 1.0 mmol) (DME = 1,2-dimethoxyethane), and dichloromethane (40 mL) were added. After stirring at room temperature for 12 hours, the resulting solid was collected by vacuum filtration, washed three times with dichloromethane, and then dried in a vacuum oven to obtain a reddish-brown solid (0.58 g, yield 88%), which is the catalyst. NMR results are shown below. Figure 3 .

[0126] Figure 1 and Figure 2 The ultraviolet spectra of coordination compound 1 under ultraviolet and visible light irradiation are presented. When the solution of coordination compound 1 is irradiated with light at a wavelength of 365 nm, the ultraviolet absorption decreases. When irradiated with light at a wavelength of 420 nm, the ultraviolet absorption recovers. These results demonstrate that the cis-trans isomerization of the azophenyl group in the catalyst of this invention is rapid and reversible, making it a highly photoresponsive compound.

[0127] Example 2

[0128] Synthesis of Compound 2: In a 100 mL round-bottom flask, dimethyl-4-aminoazobenzene (3.38 g, 15.0 mmol), 2,3-butanedione (0.66 mL, 7.5 mmol), formic acid (0.03 mL, 0.63 mmol), and methanol (60 mL) were added. After reflux for 1 day, the resulting solid was collected by vacuum filtration, washed three times with methanol, and then dried in a vacuum oven to obtain an orange-red solid, Imine-2 (0.14 g). The solid did not require purification and was directly used in the next reaction step.

[0129] Synthesis of coordination compound 2 (catalyst): In a 25 mL round-bottom flask, Imine-2 (0.125 g, 0.25 mmol), (DME)NiBr2 (0.077 g, 0.25 mmol) (DME = 1,2-dimethoxyethane), and dichloromethane (10 mL) were added. After stirring at room temperature for 12 hours, the resulting solid was collected by vacuum filtration, washed three times with dichloromethane, and then dried in a vacuum oven to obtain a reddish-brown solid (0.150 g, yield 83%), which is the catalyst. NMR results are shown below. Figure 4 .

[0130] Example 3

[0131] The coordination compound (catalyst) was used for ethylene polymerization: In a 1-liter stainless steel high-pressure polymerization reactor, the mixture was purged three times each with nitrogen and ethylene. Then, 500 mL of hexane solvent was added. Following the addition of hexane, 1 mL of 1 mol / L triethylaluminum (TEA) hexane solution and the required amount of 1-hexene were added, along with 3 mL of methylaluminoxane (10% wt toluene solution). Then, 10 mg of the coordination compound prepared in the above example, dispersed in 2 mL of toluene (without light or under 365 nm UV light), was added. The pressure was increased to and maintained at 1.1 MPa, the reaction temperature was 55 °C, and the reaction time was 1 hour. After the polymerization reaction was completed, the mixture was cooled, and the polyethylene was washed with hydrochloric acid-ethanol solution. The product was collected. Specific polymerization results are listed in Table 1.

[0132] Table 1

[0133]

[0134] Note: Mn is the polymer molecular weight; Mw / Mn is the molecular weight distribution coefficient of the polymer.

[0135] As shown in Table 1, without UV irradiation, azobenzene exists in a trans configuration, exhibiting higher catalyst activity and resulting in a higher molecular weight polyethylene. After UV irradiation, azobenzene transforms into a cis configuration, leading to lower catalyst activity and lower polymer molecular weight compared to the unirradiated state. The resulting polymers have molecular weights ranging from 2 to 4. In summary, this invention synthesizes a novel compound with photoresponsive properties. When used as a ligand, the azobenzene group in the catalyst undergoes cis-trans isomerization under UV irradiation, altering the catalyst properties and consequently the polymerization results. This means that the same catalyst can be used to prepare polyethylene with different molecular weights.

[0136] The present invention has been described in detail above with reference to specific embodiments and exemplary examples; however, these descriptions should not be construed as limiting the present invention. Those skilled in the art will understand that various equivalent substitutions, modifications, or improvements can be made to the technical solutions and embodiments of the present invention without departing from the spirit and scope of the invention, and all such modifications and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims.

[0137] All publications, patent applications, patents, and other references mentioned in this specification are incorporated herein by reference. Unless otherwise defined, all technical and scientific terms used in this specification have the meanings commonly understood by those skilled in the art. In case of conflict, the definitions in this specification shall prevail.

[0138] When this specification uses the prefixes “known to those skilled in the art,” “prior art,” or similar terms to derive materials, substances, methods, steps, apparatus, or components, the objects derived from such prefixes cover those commonly used in the art at the time of this application’s filing, but also include those that are not currently commonly used but will become generally recognized in the art as suitable for similar purposes.

[0139] In the context of this specification, except where expressly stated otherwise, any matters or issues not mentioned shall apply directly to those known in the art without any modification.

Claims

1. A compound, characterized in that: The structure of the compound is shown in formula (Ⅰ): Equation (I) Wherein, Ar is selected from the following structures: ； R1 and R2 are each independently selected from hydrogen or methyl.

2. The compound according to claim 1, characterized in that: The two Ar in formula (Ⅰ) are selected from the same substituent.

3. The compound according to claim 2, characterized in that: The compound is: Compound 1; or, Compound 2.

4. A method for preparing the compound according to any one of claims 1-3, comprising the following steps: Under the action of a catalyst, the compound shown in formula (II) and the compound shown in formula (III) react in a solvent to give the compound shown in formula (I); The structure of compound (II) is as follows: Formula (II) The structure of compound (III) is as follows: Formula (III) The R1 and R2 mentioned above are the same as those in the compounds described in any one of claims 1-3.

5. The method for preparing the compound according to claim 4, characterized in that: The catalyst is selected from organic acids; and / or, The solvent is selected from alcohols; and / or, The molar ratio of the compound of formula (II) to the compound of formula (III) is 1:2 to 1:4; and / or, The molar ratio of the compound of formula (II) to the catalyst is 30:1 to 15:1; and / or, The molar ratio of the compound of formula (II) to the solvent is 1:150 to 1:

400.

6. The method for preparing the compound according to claim 5, characterized in that: The catalyst is selected from formic acid or acetic acid; and / or, The solvent is selected from methanol or ethanol; and / or, The molar ratio of the compound of formula (II) to the solvent is 1:200 to 1:

300.

7. The method for preparing the compound according to claim 4, characterized in that: The reaction temperature is 15℃~35℃; and / or, The reaction time is 3 to 6 days; and / or, The reaction includes a post-processing step, which includes filtration, washing, and drying.

8. The method for preparing the compound according to claim 7, characterized in that: The reaction temperature is 20 °C to 30 °C; and / or, The reaction time is 4 to 5 days; and / or, The washing solvent is selected from at least one of methanol, ethanol, or isopropanol; and / or, The washing process is performed 3 to 5 times.

9. A catalyst, characterized in that: The catalyst is a complex, and its structural formula is as follows: ； Wherein, Ar corresponds to the same Ar in the compound described in any one of claims 1-3; M is a metallic element, and X is an anion.

10. The catalyst according to claim 9, characterized in that: The M is selected from Ni or Pd; and / or, X is a halide ion.

11. The catalyst according to claim 10, characterized in that: X is a bromide ion.

12. The catalyst according to claim 11, characterized in that: The catalyst is Coordination compound 1; or, Coordination compound 2.

13. The method for preparing the catalyst according to any one of claims 9-12, characterized in that, Includes the following steps: The catalyst was prepared by reacting the compound shown in formula (Ⅰ) with a metal salt in a solvent; The compound represented by formula (Ⅰ) is selected from the compounds described in any one of claims 1-3.

14. The method for preparing the catalyst according to claim 13, characterized in that: The metal salt is selected from nickel diethylene glycol dimethyl ether bromide, palladium (1,5-cyclooctadiene) dichloride; and / or, The solvent is selected from chlorinated hydrocarbons; and / or, The molar ratio of the metal salt to the compound shown in formula (I) is 2:1 to 1:1; and / or, The molar ratio of the metal salt to the solvent is 1:400 to 1:

800.

15. The method for preparing the catalyst according to claim 14, characterized in that: The solvent is selected from dichloromethane; and / or, The molar ratio of the metal salt to the compound shown in formula (I) is 1.5:1 to 1:1; and / or, The molar ratio of the metal salt to the solvent is 1:500 to 1:

700.

16. The method for preparing the catalyst according to claim 13, characterized in that: The reaction temperature is 15℃~40℃; and / or, The reaction time is 10–24 hours.

17. The method for preparing the catalyst according to claim 16, characterized in that: The reaction temperature is 20 °C to 30 °C; and / or, The reaction time is 12-18 hours.

18. A method for olefin polymerization, characterized in that, Includes the following steps: An olefin polymer is prepared by polymerizing a catalyst, a co-catalyst, and an olefin in a solvent. The catalyst is selected from at least one of the catalysts described in any one of claims 9-12 and the catalysts prepared by the method described in any one of claims 13-17.

19. The method for olefin polymerization according to claim 18, characterized in that, The cocatalyst is selected from aluminumoxanes; and / or, The olefin is selected from C2-C10 olefins; and / or, The solvent is selected from alkanes, aromatics, and halogenated hydrocarbons.

20. The method for olefin polymerization according to claim 19, characterized in that, The aluminum oxane is selected from at least one of methylaluminoxane, ethylaluminoxane, and isobutylaluminoxane; and / or, The olefin is selected from at least one of ethylene, propylene, butene, pentene, hexene, octene, and 4-methyl-1-pentene; and / or, The solvent is selected from at least one of hexaalkyl, pentane, heptane, benzene, toluene, dichloromethane, chloroform, and dichloroethane.

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