Degradable copolyester based on triethylene glycol, preparation and application

A technology of triethylene glycol and copolyester, which is applied in the field of polymer synthesis and can solve problems such as city landscape and ecological environment damage, white pollution, etc.

Active Publication Date: 2021-11-12
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a large number of plastic packaging materials for fruits and vegetables are non-degradable plastics. Discarded plastic packaging materials cause serious damage to the cityscape and ecological environment, forming "white pollution". , has become an urgent problem to be solved

Method used

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  • Degradable copolyester based on triethylene glycol, preparation and application
  • Degradable copolyester based on triethylene glycol, preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add 3.443g (10mmol) of 2,2-bicinchoninic acid, 2.442g (14mmol) of piperidine-1,4 dicarboxylic acid, 4.200g (28mmol) of triethylene glycol and 0.013g ( 0.042mmol) of antimony acetate. Nitrogen protection was introduced, and the reaction was stirred at 180°C for 3 h to obtain an esterified product. Continue to raise the temperature of the esterification product to 240°C, control the absolute pressure in the reaction system at about 80 Pa, and react for 4 hours to obtain the crude product of the polycondensation product. Add 30 mL of chloroform to the crude polyester, soak for 2 hours and then filter; take the clear liquid and add it dropwise to 50 ml of methanol to obtain a cloudy liquid, centrifuge and filter to obtain a solid, wash the obtained solid with ethanol, and filter again The solid was dried at 60°C for 2 h to obtain 8.268 g of copolyester CP 1 , and the yield was 87.38%.

[0036] Collect the copolyester CP of 100g 1 , mixed evenly with 1g chain extender ep...

Embodiment 2

[0040] Add 3.443g (10mmol) of 2,2-biscinchoninic acid, 2.791g (16mmol) of piperidine-1,4 dicarboxylic acid, 4.200g (28mmol) of triethylene glycol and 0.013g ( 0.042mmol) of antimony acetate. Nitrogen protection was introduced, and the reaction was stirred at 180°C for 3 h to obtain an esterified product. Continue to raise the temperature of the esterification product to 240°C, control the absolute pressure in the reaction system at about 80 Pa, and react for 4 hours to obtain the crude product of the polycondensation product. Add 30 mL of chloroform to the crude polyester, soak for 2 hours and then filter; take the clear liquid and add it dropwise to 50 ml of ethanol to obtain a cloudy liquid, centrifuge and filter to obtain a solid, wash the obtained solid with ethanol, and filter again The solid was dried at 60°C for 2 h to obtain 9.105 g of copolyester CP 2 , the yield is 90.05%.

[0041] Collect the copolyester CP of 100g 2 , mix uniformly with 1g chain extender epoxy ...

Embodiment 3

[0045] Add 3.787g (11mmol) of 2,2-bicinchoninic acid, 2.442g (14mmol) of piperidine-1,4 dicarboxylic acid, 4.200g (28mmol) of triethylene glycol and 0.013g ( 0.042mmol) of antimony acetate. Nitrogen protection was introduced, and the reaction was stirred at 180°C for 3 h to obtain an esterified product. Continue to raise the temperature of the esterification product to 240°C, control the absolute pressure in the reaction system at about 80 Pa, and react for 4 hours to obtain the crude product of the polycondensation product. Add 30 mL of chloroform to the crude polyester, soak for 2 hours and then filter; take the clear liquid and add it dropwise to 50 ml of isopropanol to obtain a cloudy liquid, centrifuge, filter to obtain a solid, wash the obtained solid with ethanol, and filter again The final solid was dried at 60°C for 2h to obtain 8.781g of copolyester CP 3 , and the yield was 88.17%.

[0046] Collect the copolyester CP of 100g 3 , mix uniformly with 1g chain extend...

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Abstract

The invention discloses a preparation method and application of degradable copolyester based on triethylene glycol, and belongs to the field of polyester synthesis. The method comprises the following steps: carrying out esterification reaction on monomers piperidine-1,4 dicarboxylic acid, 2,2'-bicinchoninic acid, triethylene glycol and a catalyst to obtain an esterification product; heating the esterification product for condensation polymerization to obtain a crude product of a condensation polymerization product; and finally, conducting extracting by a solvent, conducting precipitating by a precipitator, and conducting filtering and drying to obtain a target product. The weight-average molecular weight of the polyester obtained by the method disclosed by the invention is 20000-30000 g/mol. The copolyester synthesized by the method disclosed by the invention is relatively good in mechanical property and flexibility, easy to degrade by the environment and harmless to the environment. The degradable copolyester based on triethylene glycol prepared by the invention is used for preparing an antibacterial plastic matrix.

Description

technical field [0001] The invention belongs to the field of polymer synthesis, and relates to a copolyester based on triethylene glycol, a preparation method and application. Using triethylene glycol, piperidine-1,4 dicarboxylic acid and 2,2-bicinchoninic acid as raw materials, a triethylene glycol-based copolyester was synthesized by melt polymerization, which can be used to prepare antibacterial plastic thin layers matrix. Background technique [0002] Due to the advantages of low cost, easy processing, excellent mechanical properties and good chemical stability, polymer materials have developed rapidly since the 20th century, and their products are widely used in clothing, automobiles, tableware, electronic products and Daily necessities and other aspects play a very important role in human life. However, with the wide application of polymer materials in daily life, their products are easy to contact and breed many harmful microorganisms such as bacteria and viruses du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/685C08G63/78C08G63/90C08J7/00C08J5/18C08L67/02C08L39/06C08K3/16
CPCC08G63/6856C08G63/78C08G63/90C08J7/00C08J5/18C08J2367/02C08J2439/06C08K3/16
Inventor 程正载王欢王林枫蔡拴普孙欣贾如艳袁贝贝杨迎澳马里奥·高迪尔
Owner WUHAN UNIV OF SCI & TECH
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