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Preparation method of aliphatic polycarbonate polyester copolymer with zero addition of catalyst

A polycarbonate polyester and copolymer technology, applied in the field of material science, can solve the problems of unassessable safety of small-molecule organics, high toxicity of catalysts, etc., achieve huge application transformation potential, simple and efficient preparation method, and simple preparation steps Effect

Active Publication Date: 2022-04-29
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 with zero addition of catalyst
  • Preparation method of aliphatic polycarbonate polyester copolymer with zero addition of catalyst
  • Preparation method of aliphatic polycarbonate polyester copolymer with zero addition of catalyst

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 preparation method of aliphatic polycarbonate polyester copolymer of the present invention, the structural formula of described aliphatic polycarbonate polyester copolymer comprises the structural unit shown in formula 4: the described aliphatic polycarbonate polyester copolymer During the preparation process, when the structural unit described in formula 4 is coupled, the compound shown in formula 1 and the compound shown in formula 2 are used as reactants to prepare the compound shown in formula 1. The structural formula of the compound shown in formula 1 is as follows: the compound shown in formula 2 The structural formula is as follows: no catalyst is added in the preparation process, which completely avoids the potential toxic and side effects of catalyst residues. The preparation steps are simple, the yield is high, the cost is low, and it is suitable for large-scale production. The green preparation method is simple and efficient, and has huge app conversion 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 Patents(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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