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Preparation method of aliphatic polycarbonate polyester copolymer without catalyst addition

A polycarbonate polyester and copolymer technology, which is applied in the field of material science, can solve the problems of inability to evaluate the safety of small molecular organic compounds, high catalyst toxicity, etc., and achieves great application and transformation potential. The preparation method is simple and efficient, and the preparation steps are simple. Effect

Active Publication Date: 2021-07-30
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] It should be pointed out that for the biomedical field and the field of degradable plastics for food packaging, the metal catalyst residue used in ring-opening polymerization is a very important source of potential safety hazards, although there are currently explorations to replace metal catalysts with organic small molecule catalysts , but generally speaking, the toxicity of such catalysts is still high, and the safety of small molecule organic compounds cannot be evaluated

Method used

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  • Preparation method of aliphatic polycarbonate polyester copolymer without catalyst addition
  • Preparation method of aliphatic polycarbonate polyester copolymer without catalyst addition
  • Preparation method of aliphatic polycarbonate polyester copolymer without catalyst addition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The reaction formula prepared by aliphatic polycarbonate polyester copolymer is as follows:

[0050]

[0051] The preparation of aliphatic polycarbonate polyester copolymer specifically includes the steps of: weighing 0.15 gram of six-membered ring carbonate [specifically trimethylene carbonate (abbreviated as TMC)] and 0.15 cyclic lactone [specifically ε-hexyl Lactone (abbreviated as CL)] was added into a decompressible airtight container, dried in vacuum for 0.5 hour, and sealed under negative pressure. Under magnetic stirring, the reaction vessel was placed in an oil bath at 100° C. for 7 hours, and the polymerization was completed. The product was dissolved in 2mL of dichloromethane and dropped into 40mL of methanol to obtain a white precipitate. The methanol was poured while washing the product 2 times with clean methanol. After drying, an aliphatic polycarbonate polyester copolymer is obtained, whose structural formula is Weigh, calculate productive rate, p...

Embodiment 2

[0054] The reaction formula that aliphatic polycarbonate polyester copolymer prepares is with embodiment 1, and the preparation of aliphatic polycarbonate polyester copolymer specifically comprises the steps:

[0055] Weigh 0.15 g of six-membered ring carbonate [specifically trimethylene carbonate (abbreviated as TMC)] and 0.15 cyclic lactone [specifically ε-caprolactone (abbreviated as CL)] and add it to a decompressible airtight container, Vacuum dry for 0.5 hours, and seal under negative pressure. Under magnetic stirring, the reaction vessel was placed in an oil bath at 120° C. for 7 hours, and the polymerization was completed. The product was dissolved in 2mL of dichloromethane and dropped into 40mL of methanol to obtain a white precipitate. The methanol was poured while washing the product 2 times with clean methanol. After drying, an aliphatic polycarbonate is obtained, whose structural formula is Weigh, calculate productive rate, productive rate is 38%. GPC (THF as...

Embodiment 3

[0057] The reaction formula that aliphatic polycarbonate polyester copolymer prepares is with embodiment 1, and the preparation of aliphatic polycarbonate polyester copolymer specifically comprises the steps:

[0058] Weigh 0.15 g of six-membered ring carbonate [specifically trimethylene carbonate (abbreviated as TMC)] and 0.15 cyclic lactone [specifically ε-caprolactone (abbreviated as CL)] and add it to a decompressible airtight container, Vacuum dry for 0.5 hours, and seal under negative pressure. Under magnetic stirring, the reaction vessel was placed in an oil bath at 140° C. for 7 hours, and the polymerization was completed. The product was dissolved in 2mL of dichloromethane and dropped into 40mL of methanol to obtain a white precipitate. The methanol was poured while washing the product 2 times with clean methanol. After drying, an aliphatic polycarbonate is obtained, whose structural formula is Weigh, calculate productive rate, productive rate is 41%. GPC (THF as...

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Abstract

The invention discloses a preparation method of an aliphatic polycarbonate polyester copolymer. The structural formula of the aliphatic polycarbonate polyester copolymer comprises a structural unit as shown in a formula 4. In the preparation process of the aliphatic polycarbonate polyester copolymer, when the structural unit as shown in the formula 4 is coupled, a compound shown in a formula 1 and a compound shown in a formula 2 are used as reactants for preparation, the structural formula of the compound shown in the formula 1 is shown in the specification, and the structural formula of the compound shown in the formula 2 is shown in the specification. No catalyst is added in the preparation process, so that the potential toxic and side effects of catalyst residues are completely avoided. The preparation steps are simple, the yield is high, the cost is low, the method is suitable for large-scale production, and the green preparation method is simple, convenient and efficient and has huge application transformation potential.

Description

technical field [0001] The invention relates to the technical field of material science, in particular to a method for preparing an aliphatic polycarbonate polyester copolymer with zero catalyst addition. Background technique [0002] Biodegradable polymer materials refer to polymer materials that can be degraded in a microbial environment, and they have a wide range of uses as environmentally friendly materials and biomedical materials. Compared with non-biodegradable materials, it has outstanding advantages in the medical field: after completing specific functions, it is finally degraded into non-toxic small molecules in the body to be absorbed or metabolized by the organism, without residue in the body, avoiding the potential for long-term toxic and side effects of materials and The patient needs a second operation to remove the material after implantation. [0003] Biodegradable polymer materials are divided into natural and synthetic biodegradable polymer materials. N...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/64C08G63/78C08L69/00
CPCC08G63/64C08G63/78C08L69/005
Inventor 冯俊曾旋张先正
Owner WUHAN UNIV
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