A high carbonate polymer, and a method of preparing and using the same
By controlling the ring-opening polymerization reaction through a combination of specific catalysts and auxiliaries, the problem of insufficient carbonate repeating units in the synthesis of high molecular weight polycarbonate was solved, the mechanical strength and purity were improved, and efficient polymer synthesis was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
- Filing Date
- 2024-12-03
- Publication Date
- 2026-06-05
Smart Images
Figure CN122145785A_ABST
Abstract
Description
Technical Field
[0001] This application relates to a high carbonate polymer, its preparation method and application, and belongs to the field of polyester synthesis. Background Technology
[0002] With the relentless global pursuit of "carbon peaking" and "carbon neutrality," the development of biodegradable polymer materials based on renewable resources to replace traditional non-renewable fossil resources has become a strategic priority in materials science and green chemistry. Against this backdrop, cyclic carbonates, due to their unique molecular structure and their status as a typical downstream product of carbon dioxide capture and utilization (CCU) technology, have gradually attracted widespread attention. In recent years, with the continuous maturation of carbon dioxide resource utilization technologies, the production of cyclic carbonates has been increasing year by year, providing an important raw material guarantee for the development of high-value-added polymer materials. Polycarbonate can be prepared through ring-opening polymerization of cyclic carbonates, possessing excellent optical properties, electrical properties, mechanical properties, and biocompatibility, and is driving its key role in multiple fields such as engineering plastics, polymer batteries, and medicine. This rapid technological advancement provides significant support for achieving the "dual carbon" goals and also opens up new directions for the sustainable development of materials science in the future.
[0003] Significant progress has been made in the ring-opening polymerization of ethylene carbonate to date, but many bottlenecks remain. One key issue is the difficulty in synthesizing high molecular weight polyesters, as high molecular weight is a crucial indicator of polymer material performance. In 2021, He Kangqiang et al. (Angew. Chem. Int. Ed. 2021, 60, 12116-12123) used lithium hydroxide and lithium carbonate as initiators, Li7La3Zr2O 12 Potassium hydroxide, used as a catalyst in the ring-opening polymerization of ethylene carbonate, yielded a polyether electrolyte with good viscoelasticity and lithium-ion permeability, but with a low molecular weight, lack of carbonate repeating units, and poor mechanical strength. Subsequently, You et al. (Angew. Chem. Int. Ed. 2022, 134, e202113152) used potassium hydroxide as a catalyst for the ring-opening copolymerization of ethylene carbonate and phthalic anhydride, obtaining a high molecular weight polymer (11.6 kDa), but the molecular weight distribution of the copolymer reached 1.61. Despite the good progress made in the above studies, it is still impossible to obtain a high content of hard segment components, i.e., carbonate repeating units, which is usually less than 20%, and there is a lack of polyester synthesis methods to obtain higher mechanical strength.
[0004] Therefore, developing and realizing controlled ring-opening polymerization to obtain specific repeating units of polyester is a highly valuable endeavor. Summary of the Invention
[0005] To address the aforementioned problems, the present invention aims to provide a highly catalytically active catalytic strategy and a method for preparing high-carbonate repeating unit polyesters. This method can effectively activate monomers, achieve efficient polymerization of ethylene carbonate, and further improve the physical and processing properties of the polymer.
[0006] According to one aspect of this application, a high carbonate polymer is provided, the high carbonate polymer having the following structural formula:
[0007]
[0008] Where x is the number of ether repeating units and y is the number of carbonate repeating units;
[0009] The molecular weight of the high carbonate polymer is between 0.85 million and 20.55 million;
[0010] The molecular weight distribution of the high carbonate polymer is 1.10 to 1.56.
[0011] According to another aspect of this application, a method for preparing the above-mentioned high-carbonate polymer is provided, comprising the following steps:
[0012] The solvent, ethylene carbonate, free radical initiator, catalyst, and auxiliaries are mixed and reacted to obtain the high carbonate polymer.
[0013] The free radical initiator is selected from at least one of benzyl alcohol, diethylene glycol, ethylene glycol, isosorbide, and 1,3-propanediol;
[0014] The catalyst is selected from at least one of potassium hydroxide, sodium hydroxide, lithium hydroxide, carbonates including lithium carbonate, sodium carbonate, potassium carbonate, 1,8-diazabicyclo[5.4.0]undec-7-ene, 1,3-diisopropylthiourea, and phosphazene base;
[0015] The additive is selected from at least one of lithium iodide, lithium iodide, lithium tetrafluoroborate, and lithium hypochlorite;
[0016] The solvent is selected from at least one of dichloromethane, 1,4-dioxane, toluene, and cyclohexane.
[0017] The molar ratio of the catalyst, auxiliaries, free radical initiator, and ethylene carbonate is 1:0.1-2:1-10:200-50000.
[0018] The reaction temperature is 100–180°C;
[0019] The reaction time is 1 to 100 hours.
[0020] Specifically, it includes the following steps:
[0021] Step S1: Under anhydrous and oxygen-free conditions, pretreated ethylene carbonate monomer, solvent, catalyst, auxiliaries and initiator are added to a Schlenk reaction tube, and the reaction is carried out at a specific temperature for a specific time.
[0022] Step S2: After the reaction is completed, cool to room temperature, dissolve the crude product in dichloromethane, add excess cold methanol to precipitate the polymer, and obtain the high carbonate polymer after vacuum drying.
[0023] The crude product after the reaction was cooled to room temperature, dissolved in dichloromethane, and then precipitated by dropwise addition of excess cold methanol. This process was repeated three times. The resulting polymer was then vacuum dried to obtain a high-carbonate polymer. The drying time was 24-48 hours, and the drying temperature was 30-80°C.
[0024] According to another aspect of this application, an application of the above-mentioned high-carbonate polymer is provided for use in engineering plastics, polymer batteries, and medical plastics.
[0025] The beneficial effects that this application can produce include:
[0026] Compared with the prior art, the present invention has the following advantages:
[0027] (1) The method of the present invention avoids metal residue, optimizes the synthesis method, and is conducive to improving the purity and yield of the target polymer;
[0028] (2) The additives used in this invention can coordinate with the carbonyl group of ethylene carbonate, thereby effectively activating the carbonyl group, increasing the content of carbonate units and decreasing the content of ether units.
[0029] (3) The synthesis method described in this invention can adjust the molecular weight of the polymer and the number of target repeating units by changing the content of catalyst and auxiliaries. Attached Figure Description
[0030] Figure 1 The image shows the 1H NMR spectrum of the polycarbonate synthesized in Example 11. Detailed Implementation
[0031] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.
[0032] Unless otherwise specified, the raw materials used in the embodiments of this application are all purchased commercially. Preferably, the purchased ethylene carbonate, catalyst, auxiliaries, and initiator are purified before the polymerization reaction. This invention does not have a special limitation on the amount of dichloromethane used, as long as it is sufficient to fully dissolve the resulting polymerization reaction mixture; nor does it have a special limitation on the amount of ethanol used, as long as it can precipitate in a high yield.
[0033] Example 1
[0034] Inside a glove box, pretreated ethylene carbonate monomer, dichloromethane solvent, sodium hydroxide catalyst, lithium iodide auxiliaries, and benzyl alcohol initiator were added to a flame-dried Schlenk reaction tube in a molar ratio of 200:1:1:1:1. The reaction was carried out at 100°C for 1 hour. After the reaction was completed, the mixture was cooled to room temperature, dissolved in dichloromethane, and the reaction was quenched by adding an excess of cold dilute hydrochloric acid-methanol solution, which precipitated the polymer. After filtration and washing, the polymer was dried under vacuum at 30°C for 24 hours to obtain a milky white high molecular weight polyester with a number average molecular weight of 0.85 million, a molecular weight distribution of 1.56, a product yield of 65%, and a carbonate repeating unit content of 18%.
[0035] Example 2
[0036] Inside a glove box, pretreated ethylene carbonate monomer, dichloromethane solvent, potassium hydroxide catalyst, lithium iodide auxiliary agent, and benzyl alcohol initiator were added to a flame-dried Schlenk reaction tube in a molar ratio of 200:1:1:1:1. The reaction was carried out at 100°C for 1 hour. After the reaction was completed, the mixture was cooled to room temperature, dissolved in dichloromethane, and the reaction was quenched by adding an excess of cold dilute hydrochloric acid-methanol solution, which precipitated the polymer. After filtration and washing, the polymer was dried under vacuum at 30°C for 24 hours to obtain a milky white high molecular weight polyester with a number average molecular weight of 11,500, a molecular weight distribution of 1.44, a product yield of 62%, and a carbonate repeating unit content of 20%.
[0037] Example 3
[0038] Inside a glove box, pretreated ethylene carbonate monomer, dichloromethane solvent, lithium hydroxide catalyst, lithium iodide auxiliary agent, and benzyl alcohol initiator were added to a flame-dried Schlenk reaction tube in a molar ratio of 200:1:1:1:1. The reaction was carried out at 100°C for 1 hour. After the reaction was completed, the mixture was cooled to room temperature, dissolved in dichloromethane, and the reaction was quenched by adding an excess of cold dilute hydrochloric acid-methanol solution, which precipitated the polymer. After filtration and washing, the polymer was dried under vacuum at 30°C for 24 hours to obtain a milky white high molecular weight polyester with a number average molecular weight of 12,000, a molecular weight distribution of 1.26, a product yield of 68%, and a carbonate repeating unit content of 22%.
[0039] Example 4
[0040] Inside a glove box, pretreated ethylene carbonate monomer, dichloromethane solvent, potassium carbonate catalyst, lithium iodide auxiliaries, and benzyl alcohol initiator were added to a flame-dried Schlenk reaction tube in a molar ratio of 200:1:1:1:1. The reaction was carried out at 100°C for 1 hour. After the reaction was completed, the mixture was cooled to room temperature, dissolved in dichloromethane, and the reaction was quenched by adding an excess of cold dilute hydrochloric acid-methanol solution, which precipitated the polymer. After filtration and washing, the polymer was dried under vacuum at 30°C for 24 hours to obtain a milky white high molecular weight polyester with a number average molecular weight of 12,000, a molecular weight distribution of 1.34, a product yield of 60%, and a carbonate repeating unit content of 26%.
[0041] Example 5
[0042] Inside a glove box, pretreated ethylene carbonate monomer, dichloromethane solvent, sodium carbonate catalyst, lithium iodide auxiliaries, and benzyl alcohol initiator were added to a flame-dried Schlenk reaction tube in a molar ratio of 200:1:1:1:1. The reaction was carried out at 100°C for 1 hour. After the reaction was completed, the mixture was cooled to room temperature, dissolved in dichloromethane, and the reaction was quenched by adding an excess of cold dilute hydrochloric acid-methanol solution, which precipitated the polymer. After filtration and washing, the polymer was dried under vacuum at 30°C for 24 hours to obtain a milky white high molecular weight polyester with a number average molecular weight of 11,500, a molecular weight distribution of 1.44, a product yield of 65%, and a carbonate repeating unit content of 30%.
[0043] Example 6
[0044] Inside a glove box, pretreated ethylene carbonate monomer, dichloromethane solvent, potassium carbonate catalyst, lithium iodide auxiliaries, and benzyl alcohol initiator were added to a flame-dried Schlenk reaction tube in a molar ratio of 200:1:1:1:1. The reaction was carried out at 100°C for 1 hour. After the reaction was completed, the mixture was cooled to room temperature, dissolved in dichloromethane, and the reaction was quenched by adding an excess of cold dilute hydrochloric acid-methanol solution, which precipitated the polymer. After filtration and washing, the polymer was dried under vacuum at 30°C for 24 hours to obtain a milky white high molecular weight polyester with a number average molecular weight of 12,700, a molecular weight distribution of 1.39, a product yield of 57%, and a carbonate repeating unit content of 34%.
[0045] Example 7
[0046] Inside a glove box, pretreated ethylene carbonate monomer, dichloromethane solvent, 1,8-diazabicyclo[5.4.0]undec-7-ene catalyst, lithium iodide auxiliaries, and benzyl alcohol initiator were added to a flame-dried Schlenk reaction tube in a molar ratio of 200:1:1:1:1. The reaction was carried out at 100°C for 1 hour. After the reaction was completed, the mixture was cooled to room temperature, dissolved in dichloromethane, and the reaction was quenched by adding excess cold dilute hydrochloric acid-methanol solution, which precipitated the polymer. After filtration and washing, the polymer was dried under vacuum at 30°C for 24 hours to obtain a milky white high molecular weight polyester with a number average molecular weight of 105,700, a molecular weight distribution of 1.42, a product yield of 67%, and a carbonate repeating unit content of 42%.
[0047] Example 8
[0048] Inside a glove box, pretreated ethylene carbonate monomer, dichloromethane solvent, 1,3-diisopropylthiourea catalyst, lithium iodide auxiliaries, and benzyl alcohol initiator were added to a flame-dried Schlenk reaction tube in a molar ratio of 200:1:1:1:1. The reaction was carried out at 100°C for 1 hour. After the reaction was completed, the mixture was cooled to room temperature, dissolved in dichloromethane, and the reaction was quenched by adding an excess of cold dilute hydrochloric acid-methanol solution, which precipitated the polymer. After filtration and washing, the polymer was dried under vacuum at 30°C for 24 hours to obtain a milky white high molecular weight polyester with a number average molecular weight of 86,400, a molecular weight distribution of 1.38, a product yield of 70%, and a carbonate repeating unit content of 37%.
[0049] Example 9
[0050] Inside a glove box, pretreated ethylene carbonate monomer, dichloromethane solvent, phosphazene base catalyst, lithium iodide auxiliaries, and benzyl alcohol initiator were added to a flame-dried Schlenk reaction tube in a molar ratio of 200:1:1:1:1. The reaction was carried out at 100°C for 1 hour. After the reaction was completed, the mixture was cooled to room temperature, dissolved in dichloromethane, and the reaction was quenched by adding an excess of cold dilute hydrochloric acid-methanol solution, which precipitated the polymer. After filtration and washing, the polymer was dried under vacuum at 30°C for 24 hours to obtain a milky white high molecular weight polyester with a number average molecular weight of 105,700, a molecular weight distribution of 1.42, a product yield of 67%, and a carbonate repeating unit content of 45%.
[0051] Example 10
[0052] Inside a glove box, pretreated ethylene carbonate monomer, dichloromethane solvent, 1,8-diazabicyclo[5.4.0]undec-7-ene catalyst, lithium iodide auxiliaries, and benzyl alcohol initiator were added to a flame-dried Schlenk reaction tube in a molar ratio of 200:1:1:1:0.1. The reaction was carried out at 100°C for 1 h. After the reaction was completed, the mixture was cooled to room temperature, dissolved in dichloromethane, and the reaction was quenched by adding excess cold dilute hydrochloric acid-methanol solution, which precipitated the polymer. After filtration and washing, the polymer was dried under vacuum at 30°C for 24 h to obtain a milky white high molecular weight polyester with a number average molecular weight of 166,200, a molecular weight distribution of 1.24, a product yield of 60%, and a carbonate repeating unit content of 46%.
[0053] Example 11
[0054] Inside a glove box, pretreated ethylene carbonate monomer, dichloromethane solvent, 1,8-diazabicyclo[5.4.0]undec-7-ene catalyst, lithium iodide auxiliaries, and benzyl alcohol initiator were added to a flame-dried Schlenk reaction tube in a molar ratio of 200:1:1:1:0.1. The reaction was carried out at 180°C for 24 h. After the reaction was completed, the mixture was cooled to room temperature, dissolved in dichloromethane, and the reaction was quenched by adding excess cold dilute hydrochloric acid-methanol solution, which precipitated the polymer. After filtration and washing, the polymer was dried under vacuum at 30°C for 24 h to obtain a milky white high molecular weight polyester with a number average molecular weight of 205,500, a molecular weight distribution of 1.10, a product yield of 73%, and a carbonate repeating unit content of 42%.
[0055] Example 12
[0056] Inside a glove box, pretreated ethylene carbonate monomer, dichloromethane solvent, 1,8-diazabicyclo[5.4.0]undec-7-ene catalyst, lithium iodide auxiliaries, and benzyl alcohol initiator were added to a flame-dried Schlenk reaction tube in a molar ratio of 200:1:1:1:0.1. The reaction was carried out at 180°C for 100 h. After the reaction was completed, the mixture was cooled to room temperature, dissolved in dichloromethane, and the reaction was quenched by adding excess cold dilute hydrochloric acid-methanol solution, which precipitated the polymer. After filtration and washing, the polymer was dried under vacuum at 30°C for 24 h to obtain a milky white high molecular weight polyester with a number average molecular weight of 166,200, a molecular weight distribution of 1.56, a product yield of 64%, and a carbonate repeating unit content of 46%.
[0057] Example 13
[0058] Inside a glove box, pretreated ethylene carbonate monomer, dichloromethane solvent, 1,8-diazabicyclo[5.4.0]undec-7-ene catalyst, lithium iodide auxiliaries, and benzyl alcohol initiator were added to a flame-dried Schlenk reaction tube in a molar ratio of 200:1:1:1:2. The reaction was carried out at 180°C for 24 h. After the reaction was completed, the mixture was cooled to room temperature, dissolved in dichloromethane, and the reaction was quenched by adding excess cold dilute hydrochloric acid-methanol solution, which precipitated the polymer. After filtration and washing, the polymer was dried under vacuum at 30°C for 24 h to obtain a milky white high molecular weight polyester with a number average molecular weight of 197,000, a molecular weight distribution of 1.45, a product yield of 70%, and a carbonate repeating unit content of 41%.
[0059] Example 14
[0060] Inside a glove box, pretreated ethylene carbonate monomer, dichloromethane solvent, 1,8-diazabicyclo[5.4.0]undec-7-ene catalyst, lithium iodide auxiliaries, and benzyl alcohol initiator were added to a flame-dried Schlenk reaction tube in a molar ratio of 200:1:1:1:10. The reaction was carried out at 180°C for 24 h. After the reaction was completed, the mixture was cooled to room temperature, dissolved in dichloromethane, and the reaction was quenched by adding excess cold dilute hydrochloric acid-methanol solution, which precipitated the polymer. After filtration and washing, the polymer was dried under vacuum at 30°C for 24 h to obtain a milky white high molecular weight polyester with a number average molecular weight of 123,000, a molecular weight distribution of 1.23, a product yield of 55%, and a carbonate repeating unit content of 34%.
[0061] Example 15
[0062] Inside a glove box, pretreated ethylene carbonate monomer, solvent 1,4-dioxane, catalyst 1,8-diazabicyclo[5.4.0]undec-7-ene, auxiliary agent lithium iodide, and initiator benzyl alcohol were added to a flame-dried Schlenk reaction tube in a molar ratio of 200:1:1:2:0.1. The reaction was carried out at 180°C for 24 h. After the reaction was completed, the mixture was cooled to room temperature, dissolved in dichloromethane, and the reaction was quenched by adding excess cold dilute hydrochloric acid-methanol solution, which precipitated the polymer. After filtration, washing, and vacuum drying at 30°C for 24 h, a milky white high molecular weight polyester was obtained with a number average molecular weight of 164,500, a molecular weight distribution of 1.32, a product yield of 70%, and a carbonate repeating unit content of 38%.
[0063] Example 16
[0064] Inside a glove box, pretreated ethylene carbonate monomer, toluene solvent, 1,8-diazabicyclo[5.4.0]undec-7-ene catalyst, lithium iodide auxiliaries, and benzyl alcohol initiator were added to a flame-dried Schlenk reaction tube in a molar ratio of 200:1:1:1:0.1. The reaction was carried out at 180°C for 24 h. After the reaction was completed, the mixture was cooled to room temperature, dissolved in dichloromethane, and the reaction was quenched by adding excess cold dilute hydrochloric acid-methanol solution, which precipitated the polymer. After filtration, washing, and vacuum drying at 30°C for 24 h, a milky white high molecular weight polyester was obtained with a number average molecular weight of 119,000, a molecular weight distribution of 1.22, a product yield of 45%, and a carbonate repeating unit content of 32%.
[0065] Example 17
[0066] Inside a glove box, pretreated ethylene carbonate monomer, cyclohexane solvent, 1,8-diazabicyclo[5.4.0]undec-7-ene catalyst, lithium iodide auxiliaries, and benzyl alcohol initiator were added to a flame-dried Schlenk reaction tube in a molar ratio of 200:1:1:1:0.1. The reaction was carried out at 180°C for 24 h. After the reaction was completed, the mixture was cooled to room temperature, dissolved in dichloromethane, and the reaction was quenched by adding excess cold dilute hydrochloric acid-methanol solution, which precipitated the polymer. After filtration, washing, and vacuum drying at 30°C for 24 h, a milky white high molecular weight polyester was obtained with a number average molecular weight of 134,000, a molecular weight distribution of 1.39, a product yield of 53%, and a carbonate repeating unit content of 40%.
[0067] Example 18
[0068] Inside a glove box, pretreated ethylene carbonate monomer, solvent 1,4-dioxane, catalyst 1,8-diazabicyclo[5.4.0]undec-7-ene, auxiliary agent lithium tetrafluoroborate, and initiator benzyl alcohol were added to a flame-dried Schlenk reaction tube in a molar ratio of 200:1:1:1:1. The reaction was carried out at 180°C for 24 h. After the reaction was completed, the mixture was cooled to room temperature, dissolved in dichloromethane, and the reaction was quenched by adding an excess of cold dilute hydrochloric acid-methanol solution, which precipitated the polymer. After filtration, washing, and vacuum drying at 30°C for 24 h, a milky white high molecular weight polyester was obtained with a number average molecular weight of 205,500, a molecular weight distribution of 1.37, a product yield of 66%, and a carbonate repeating unit content of 36%.
[0069] Example 19
[0070] Inside a glove box, pretreated ethylene carbonate monomer, solvent 1,4-dioxane, catalyst 1,8-diazabicyclo[5.4.0]undec-7-ene, auxiliary agent lithium hypochlorite, and initiator benzyl alcohol were added to a flame-dried Schlenk reaction tube in a molar ratio of 200:1:1:1:1. The reaction was carried out at 180°C for 24 h. After the reaction was completed, the mixture was cooled to room temperature, dissolved in dichloromethane, and the reaction was quenched by adding an excess of cold dilute hydrochloric acid-methanol solution, which precipitated the polymer. After filtration, washing, and vacuum drying at 30°C for 24 h, a milky white high molecular weight polyester was obtained with a number average molecular weight of 86,400, a molecular weight distribution of 1.26, a product yield of 65%, and a carbonate repeating unit content of 31%.
[0071] Example 20
[0072] Inside a glove box, pretreated ethylene carbonate monomer, solvent 1,4-dioxane, catalyst 1,8-diazabicyclo[5.4.0]undec-7-ene, auxiliary agent lithium hypochlorite, and initiator benzyl alcohol were added to a flame-dried Schlenk reaction tube in a molar ratio of 200:1:1:1:1. The reaction was carried out at 180°C for 24 h. After the reaction was completed, the mixture was cooled to room temperature, dissolved in dichloromethane, and the reaction was quenched by adding an excess of cold dilute hydrochloric acid-methanol solution, which precipitated the polymer. After filtration, washing, and vacuum drying at 30°C for 24 h, a milky white high molecular weight polyester was obtained with a number average molecular weight of 93,800, a molecular weight distribution of 1.28, a product yield of 61%, and a carbonate repeating unit content of 33%.
[0073] The above description is merely a few embodiments of this application and is not intended to limit this application in any way. Although this application discloses preferred embodiments as described above, it is not intended to limit this application. Any changes or modifications made by those skilled in the art without departing from the scope of the technical solution of this application using the disclosed technical content are equivalent to equivalent implementation cases and fall within the scope of the technical solution.
Claims
1. A high carbonate polymer, characterized in that, The structural formula of the high carbonate polymer is: Where x is the number of ether repeating units and y is the number of carbonate repeating units; The molecular weight of the high carbonate polymer is between 0.85 million and 20.55 million; The molecular weight distribution of the high carbonate polymer is 1.10 to 1.
56.
2. A method for preparing the high carbonate polymer according to claim 1, characterized in that, Includes the following steps: The solvent, ethylene carbonate, free radical initiator, catalyst, and auxiliaries are mixed and reacted to obtain the high carbonate polymer.
3. The preparation method according to claim 2, characterized in that, The free radical initiator is selected from at least one of benzyl alcohol, diethylene glycol, ethylene glycol, isosorbide, and 1,3-propanediol; The catalyst is selected from at least one of potassium hydroxide, sodium hydroxide, lithium hydroxide, carbonates including lithium carbonate, sodium carbonate, potassium carbonate, 1,8-diazabicyclo[5.4.0]undec-7-ene, 1,3-diisopropylthiourea, and phosphazene base; The additive is selected from at least one of lithium iodide, lithium iodide, lithium tetrafluoroborate, and lithium hypochlorite; The solvent is selected from at least one of dichloromethane, 1,4-dioxane, toluene, and cyclohexane.
4. The preparation method according to claim 2, characterized in that, The molar ratio of the catalyst, auxiliaries, free radical initiator, and ethylene carbonate is 1:0.1-2:1-10:200-50000.
5. The preparation method according to claim 2, characterized in that, The reaction temperature is 100–180°C; The reaction time is 1 to 100 hours.
6. An application of the high carbonate polymer according to claim 1, characterized in that, Used in engineering plastics, polymer batteries, and medical plastics.