Bridge chain structure biological base polyester, preparation method and application thereof

A technology based on polyester and bridge chains, which is applied in the field of organic polymer synthesis, can solve problems such as high requirements for production equipment, unfavorable industrial production, complex process flow, etc., to reduce net carbon emissions, good application prospects, and mechanical properties and the effect of performance improvement

Active Publication Date: 2019-03-08
WUHAN RUIKAIXING SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] CN104479120A discloses a biodegradable aliphatic-aromatic copolyester containing polyether side chains. The preparation of the copolyester requires the synthesis of aromatic polyester units, linear aromatic polyester units and aliphatic polyether side chains. Three prepolymers of family polyester units, the process is complex, and the requirements for production equipment are high, which is not conducive to industrial production
However, the follow-up performance test results show that the melting points of the series of resins are all less than 125°C, which limits their application in production and life.

Method used

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  • Bridge chain structure biological base polyester, preparation method and application thereof
  • Bridge chain structure biological base polyester, preparation method and application thereof
  • Bridge chain structure biological base polyester, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Using 5-hydroxymethylfurfural as a starting material to synthesize dibasic acid monomer P1 with oxygen-containing siloxane bridge chain structure, the structural formula of said dibasic acid P1 is:

[0036]

[0037] The specific steps for synthesizing polyester P1 are: take 20 mmol of 5-hydroxymethylfurfural and place it in a reaction vessel, dissolve dichlorodimethylsilane with 40 mL of tetrahydrofuran (THF), and add the solution dropwise to the reaction vessel. Wherein the molar ratio of 5-hydroxymethylfurfural to dichlorodimethylsilane is 2: 1.1, the temperature is controlled at 65° C., the reaction is magnetically stirred for 2 hours, filtered, the filtrate is taken, and the solvent THF is removed by distillation of the filtrate under reduced pressure to obtain a Dibasic aldehydes with bridged chain structures. Then the resulting binary aldehyde was dissolved in 50 mL of acetonitrile, and 5 mL of dilute nitric acid solution with a mass fraction of 20% and 10 mL o...

Embodiment 2

[0042] Using vanillin as a starting material to synthesize an oxygen-containing carbon-oxygen bridge structure dibasic acid monomer P2, the structural formula of the dibasic acid P2 is:

[0043]

[0044] The specific steps of synthesizing polyester P2 are: take vanillin 20mmol and place it in a reaction vessel, dissolve 1,2-dibromoethane with 40mL tetrahydrofuran (THF), and add the solution dropwise to the reaction vessel, wherein the vanillin The molar ratio of aldehyde to 1,2-dibromoethane is 2:1.1, the temperature is controlled at 65°C, the reaction is carried out with magnetic stirring for 2 hours, filtered, the filtrate is taken, and the solvent THF is removed by distillation of the filtrate under reduced pressure to obtain a bridging chain structure binary aldehydes. Then the resulting binary aldehyde was dissolved with 50 mL of acetonitrile, and 6.8 mL of dilute nitric acid solution with a mass fraction of 20% and 12 mL of 30% H 2 o 2 As an oxidant, control the tem...

Embodiment 3

[0049] Using syringaldehyde as a starting material to synthesize an oxygen-containing silicone bridge structure dibasic acid monomer P3, the structural formula of the dibasic acid P3 is:

[0050]

[0051] The specific steps for synthesizing polyester P3 are: place 20 mmol of syringaldehyde in a reaction vessel, dissolve dichlorodimethylsilane with 40 mL of tetrahydrofuran (THF), and add the solution dropwise to the reaction vessel, wherein syringaldehyde and dichloro The molar ratio of dimethylsilane is 2:1.1, the temperature is controlled at 65°C, the reaction is carried out with magnetic stirring for 2 hours, filtered, the filtrate is taken, and the solvent THF is removed by distillation of the filtrate under reduced pressure to obtain a binary aldehyde with a bridged chain structure. Then the resulting binary aldehyde was dissolved with 50 mL of acetonitrile, and 7.5 mL of 20% dilute nitric acid solution and 13.8 mL of 30% H 2 o 2 As an oxidant, control the temperature ...

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Abstract

The invention discloses bridge chain structure biological base polyester, a preparation method and an application thereof. The method comprises the following steps: firstly enabling one of vanillic aldehyde, syringaldehyde and 5-hydroxymethylfurfural to be coupled with 1,2-dibromoethane or dichlorodimethylsilane, and performing catalytic oxidation, to obtain a new-type diacid monomer containing abridge chain structure; and then, performing an esterification reaction on the diacid monomer, aliphatic diol and a catalyst in 160-180 DEG C and nitrogen protection, to obtain a prepolymer; stoppingfeeding a nitrogen gas, rising a temperature to 220-240 DEG C, opening a vacuum pump and reducing a system pressure below 20 Pa, and performing a polycondensation reaction, to obtain a polymer crude product; adding an enough amount of chloroform to the polymer until the polymer is completely dissolved, to obtain clear liquid, dropwise adding the clear liquid to an alcohols solvent, generating a white precipitate, centrifugally separating, to obtain a white solid, alcohol-washing the white solid, filtering, and drying a filter residue, to obtain the biological base polyester containing the bridge chain structure. The bridge chain structure biological base polyester has the characteristics of green and environmental reaction process, high polyester yield, good heat stability and degradationproperty of a polyester material and the like.

Description

technical field [0001] The invention belongs to the field of organic polymer synthesis, and in particular relates to a biodegradable polyester, a preparation method and an application thereof. technical background [0002] On December 31, 2007, the General Office of the State Council issued the "Notice on Restricting the Use of Plastic Shopping Bags in Production and Sales". This notice called the "Plastic Restriction Order" requires that from June 1, 2008, the production, sale, and use of plastic shopping bags with a thickness of less than 0.025 mm will be banned nationwide. All supermarkets, shopping malls, and bazaars No plastic shopping bags shall be provided free of charge in any commodity retail establishments. According to statistics from the China Plastics Recycling Professional Committee, in 2008, when the "Plastic Restriction Order" was implemented, China used as many as 3 billion plastic bags every day, of which 1 billion were only used for grocery shopping. . ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/695C08G63/672B65D65/46
CPCB65D65/466C08G63/672C08G63/6956
Inventor 程正载曾胜胡海刘盼盼李光要熊景马里奥·高斯尔
Owner WUHAN RUIKAIXING SCI & TECH
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