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Synthetic method of gradient polyester

A synthesis method and gradient technology, applied in the field of gradient polyester synthesis, can solve problems such as difficult synthesis and difficult characterization, and achieve the effects of simple operation, mild conditions, and expansion of types and application fields.

Inactive Publication Date: 2021-05-11
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems of "difficult synthesis" and "difficult characterization" in the research of chiral polymers due to the lack of research on the chirality of polymer chains in the prior art, the present invention provides a synthetic method for graded polyester

Method used

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  • Synthetic method of gradient polyester
  • Synthetic method of gradient polyester
  • Synthetic method of gradient polyester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: the synthetic method of a kind of gradient type polyester of the present embodiment is carried out as follows:

[0040]

[0041] Take a 5mL Schlenk tube, roast it and replace the argon, then add 1mL of toluene, ε-caprolactone (CL-1) monomer (250μmol, 50equiv.), CPA-1 catalyst (5μmol, 1equiv. ), then add 5 μL of benzyl alcohol in toluene solution, the concentration of benzyl alcohol in the toluene solution of benzyl alcohol is 1mol / L, move the reaction tube out of the glove box, and stir the reaction for 9h at 90°C to obtain the gradient polyε-hexyl Lactone.

Embodiment 2

[0042] Embodiment 2: the difference between this embodiment and embodiment 1 is: the reaction time is 32h. Other steps and parameters are the same as in Example 1.

Embodiment 3

[0043] Embodiment 3: The difference between this embodiment and embodiment 1 is: the catalyst is CPA-2, and the reaction time is 16h. Other steps and parameters are the same as in Example 1.

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Abstract

The invention discloses a synthetic method of gradient polyester. The invention belongs to the field of polymer synthetic materials. The invention aims to solve the technical problems of lack of research on chirality of a polymer chain and difficulty in synthesis and characterization in research on a chiral polymer in the prior art. The synthetic method of the gradient polyester comprises the following steps: under normal pressure and inert gas protection, in an organic solvent, racemic substituted lactone is used as a polymeric monomer, chiral phosphoric acid is used as a catalyst, and an alcohol compound is used as an initiator; and ring-opening resolution polymerization is realized by utilizing the difference of the reaction rates of two enantiomers in the polymeric monomer, so that the gradient polyester is obtained. According to the asymmetric resolution polymerization method for racemic substituted lactone, novel polyester with a gradient structure can be obtained, the types and application fields of polyester materials are expanded, and development of chiral polymer functional materials is promoted. The method is simple and convenient to operate, mild in condition and controllable in polymerization activity, and the generated polymer is free of metal residues.

Description

technical field [0001] The invention belongs to the field of polymer synthetic materials, and in particular relates to a synthetic method of gradient polyester. Background technique [0002] Chirality is a basic attribute of nature, and there are a large number of chiral molecules in nature and living organisms. The study of chirality plays an important role in the fields of life science, pharmacy and material science. In the field of material science, chiral polymers are a special polymer material, and the chirality of the polymer chain significantly affects the properties of the resulting polymer material, such as spatial arrangement, material strength, dielectric properties, and material strength; these The special properties make the synthesized polymers have unique applications different from ordinary polymers, such as chiral separation materials, chiral liquid crystal materials, chiral sensing materials and chiral electromagnetic materials, etc., so it is important fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/08C08G63/87
CPCC08G63/08C08G63/823
Inventor 王庆刚徐广强吕承东杨茹琳
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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