Catalyst composition and terpolymer synthesis method

A compound and composition technology, applied in the field of catalyst composition and terpolymer synthesis, can solve the problem of low glass transition temperature and achieve good thermodynamic properties

Active Publication Date: 2017-06-30
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Polycarbonate with large molecular weight and polycarbonate with high stereoselectivity have been successfully synthesized. However, due to the limitation of the structure of the polymer itself, the glass transition temperature of the currently synthesized polycarbonate is generally low.

Method used

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  • Catalyst composition and terpolymer synthesis method
  • Catalyst composition and terpolymer synthesis method
  • Catalyst composition and terpolymer synthesis method

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preparation example Construction

[0049] The invention provides a kind of synthetic method of terpolymer, comprises the following steps:

[0050] In the presence of the catalyst composition described in the above technical solution, the propylene oxide, carbon dioxide and lactide are polymerized to obtain a terpolymer.

[0051] In the synthesis method provided by the invention, propylene oxide, carbon dioxide and lactide are directly polymerized in the presence of the catalyst composition. The specific process includes: first adding the catalyst composition, propylene oxide and lactide into the autoclave, then feeding carbon dioxide into the autoclave, and then polymerizing the reactants in the autoclave at a certain temperature reaction. In the present invention, the molar ratio of propylene oxide to lactide is preferably 1: (0.05-0.25), and may be 1:0.05, 1:0.06, 1:0.07, 1:0.08, 1:0.09, 1:0.1, 1:0.11, 1:0.12, 1:0.13, 1:0.14, 1:0.15, 1:0.16, 1:0.17, 1:0.18, 1:0.19, 1:0.2, 1:0.21, 1:0.19 0.22, 1:0.23, 1:0.2...

Embodiment 1

[0057] 2.18g of propylene oxide, 0.82g of lactide, 0.029g of catalyst I, 0.023g of catalyst IV and 0.022g of PPNCl were mixed and added into the autoclave that had undergone high-temperature water and oxygen removal, and high-purity carbon dioxide gas was introduced into it, and Press down to 2MPa, control the temperature and stir at 60°C, and react for 2h;

[0058] After the reaction, place the reaction kettle in ice water to cool down rapidly, then slowly release the residual gas until the pressure drops to atmospheric pressure, dissolve the obtained reaction product with 15mL of dichloromethane, slowly drop the obtained solution into 200mL of ethanol, stir After 15 minutes, stand still for 30 minutes; dissolve the precipitated polymer in dichloromethane again, settle in ethanol, repeat 3 times, and vacuum-dry the precipitate obtained by the precipitation to obtain a reaction product.

[0059] The resulting polymer was 1 H-NMR and 13 C-NMR analysis shows that the product o...

Embodiment 2

[0063] Mix 2.18g of propylene oxide, 0.82g of lactide, 0.028g of catalyst II, 0.023g of catalyst V and 0.022g of PPNCl into a high-pressure reactor that has undergone high-temperature dehydration and oxygen removal, and introduce high-purity carbon dioxide gas into it, and add Press down to 2MPa, control the temperature and stir at 60°C, and react for 2h;

[0064] After the reaction, place the reaction kettle in ice water to cool down rapidly, then slowly release the residual gas until the pressure drops to atmospheric pressure, dissolve the obtained reaction product with 15mL of dichloromethane, slowly drop the obtained solution into 200mL of ethanol, stir After 15 minutes, stand still for 30 minutes; dissolve the precipitated polymer in dichloromethane again, settle in ethanol, repeat 3 times, and vacuum-dry the precipitate obtained by the precipitation to obtain a reaction product.

[0065] The resulting polymer is 1 H-NMR and 13 C-NMR analysis shows that the product obta...

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Abstract

The present invention belongs to the field of polymer materials, and particularly relates to a catalyst composition and a terpolymer synthesis method. The catalyst composition comprises a Schiff base trivalent cobalt compound, a Schiff base divalent cobalt compound and a co-catalyst, wherein the Schiff base trivalent cobalt compound is one or a plurality of materials selected from compounds represented by formulas I-III, the Schiff base divalent cobalt compound is one or a plurality of materials selected from compounds represented by formulas IV-VI, and the co-catalyst comprises one or a plurality of materials selected from bis(triphenylphosphine)iminium chloride, 4-dimethylamino pyridine, N-methylimidazole, tricyclohexylphosphine, tetramethylammonium bromide and tetrabutylammonium bromide. According to the present invention, by using the catalyst composition, propylene oxide, carbon dioxide and lactide can be synthesized into the copolymer having the gradual multi-block structure, wherein the glass transition temperature of the copolymer can be up to more than 50 DEG C. The formulas I-VI are defined in the specification.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to a catalyst composition and a synthesis method of a terpolymer. Background technique [0002] With the acceleration of the world's industrialization process, energy consumption is increasing, and carbon dioxide emissions are increasing sharply, making the CO in the atmosphere 2 Concentrations continue to rise, causing global warming. According to calculation, CO 2 When the concentration increases from 300ppm to 600ppm, the surface temperature will increase by 2 to 3 degrees Celsius. According to statistics, the world emits CO in the atmosphere every year 2 More than 24 billion tons, of which about 15 billion tons are absorbed by the photosynthesis of plants, so the net increase of CO in the atmosphere every year 2 9 billion tons. No matter from energy, carbon source and CO reduction 2 In terms of environmental pollution, the control of CO 2 emissions and enhanced CO 2 The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/34C08G64/38
CPCC08G64/34C08G64/38
Inventor 庞烜李想张渝段然龙陈学思
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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