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A kind of comb type polyester compound and preparation method thereof

A compound and polyester technology, applied in the field of polymer materials, can solve problems such as high bulk viscosity and high crystallinity, and achieve the effects of cheap and easy-to-obtain raw materials, convenient and practical operation, and good practical value

Active Publication Date: 2021-04-02
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, common linear polyester materials have disadvantages such as high bulk viscosity and high crystallinity.

Method used

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  • A kind of comb type polyester compound and preparation method thereof
  • A kind of comb type polyester compound and preparation method thereof
  • A kind of comb type polyester compound and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0019] The embodiment of the present invention provides a kind of preparation method of comb polyester compound, it comprises:

[0020] The polyhydroxyl macromolecular chain transfer agent is used as a chain transfer center, the polyhydroxyl macromolecular chain transfer agent is mixed with cyclic ester monomers, and a ring-opening polymerization reaction occurs under the catalysis of an organic metal catalyst.

[0021] Macromolecules with topological structures such as dendritic, comb-shaped, hyperbranched, star-shaped, and H-shaped branched chain structures and ring-shaped topological polymers are of great significance in the fields of material modification, nanotechnology and biomedicine. New functional polymers with important application prospects have been paid more and more attention by people. However, due to the cumbersome preparation process of polymers with topological structures, its research progress is greatly limited. The preparation method provided by the embod...

Embodiment 1

[0066] The present embodiment provides a kind of polyhydroxyl macromolecular chain transfer agent, and its preparation method is as follows:

[0067] S1. Dissolve 4.8 mmol of organic ligand (2,2'-bipyridine), 72 mmol of the first acrylate monomer (methyl acrylate), and 8 mmol of the second acrylate monomer (hydroxyethyl acrylate) in THF .

[0068] S2. Add 1.6 mmol metal compound (CuCl) and 1.6 mmol initiator (ethyl 2-bromopropionate), and react at 100°C for 6 h.

[0069] S3. Quench the reaction at -15°C, pass the product through a neutral alumina chromatography column, and use tetrahydrofuran as the eluent to remove the catalyst in the product.

[0070] S4. Concentrate by rotary evaporation, and precipitate in industrial ethanol.

[0071] S5. The precipitated product was dried in a vacuum oven at 40°C for 48 h to obtain a white powder product (yield 97.1%, M n =6900, molecular weight distribution M n / M w =1.24. )

Embodiment 2

[0073] The present embodiment provides a kind of polyhydroxyl macromolecular chain transfer agent, and its preparation method is as follows:

[0074] S1. Dissolve 4.8 mmol of organic ligand (2,2'-bipyridine), 56 mmol of the first acrylate monomer (ethyl acrylate), and 24 mmol of the second acrylate monomer (hydroxypropyl acrylate) in THF .

[0075] S2. Add 1.6 mmol metal compound (CuCl) and 1.6 mmol initiator (ethyl 2-bromopropionate), and react at 100°C for 8 h.

[0076] S3. Quench the reaction at -15°C, pass the product through a neutral alumina chromatography column, and use tetrahydrofuran as the eluent to remove the catalyst in the product.

[0077]S4. Concentrate by rotary evaporation, and precipitate in industrial ethanol.

[0078] S5. The precipitated product was dried in a vacuum oven at 40°C for 48 h to obtain a white powder product (yield 96.1%, M n =6609, molecular weight distribution M n / M w =1.12. )

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Abstract

The invention discloses a comb-type polyester compound and a preparation method thereof, and relates to the field of polymer materials. According to the preparation method, a polyhydroxy macromolecular chain transferring agent serving as a chain transferring center undergoes a ring opening polymerization reaction with a cyclic ester monomer under the catalytic action of an organic metal catalyst,so that the polyester compound with a comb-type topological structure is obtained efficiently at a high conversion rate. The preparation method has the advantages of adoption of cheap and readily-available raw materials, convenience and practicability in operation, and suitability for large-scale industrial production. Control over the branch chain length of the comb-type polyester compound can berealized better by adjusting the feed ratio, so that the practical value is high. The comb-type polyester compound prepared with the preparation method of the comb-type polyester compound has higherhydrophilicity, higher machining performance, controllable molecular weight and a great application prospect, and can be taken as a raw material of high-molecular drug bearing microspheres.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a comb-shaped polyester compound and a preparation method thereof. Background technique [0002] The "Immortal" ring-opening polymerization process of cyclic ester monomers is a rapid exchange between the chain transfer agent small molecule alcohol (ROH) and the growing chain, and finally forms a large number of dormant polymers ending with alcoholic hydroxyl groups (such as lactide "Immortal" ring-opening polymerization to form: RO-PLA-OH dormant polymer) and growing polymer chain (LMOPLA-OR) (L=ligand, M=metal catalytic center) fast exchange alternate growth polymerization system. Compared with the traditional living polymerization system, one catalyst molecule only initiates the growth of one polymer chain, in the "Immortal" polymerization system, one catalytic center can obtain multiple polymerization growth chains. This will greatly reduce the amount of catalyst used, save ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/08C08G63/85C08F220/14C08F220/18C08F220/20
CPCC08F220/14C08F220/18C08G63/08C08G63/823C08F220/1803C08F220/1804C08F220/20
Inventor 王玲芳陆琛吉海军苏桂花张雅恒安晶施庆乐
Owner YANCHENG INST OF TECH
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