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Degradable bio-based polyester as well as preparation method, degradation method and application thereof

A technology based on polyester and biotechnology, applied in the field of bio-based polyester and its preparation, can solve the problems of single degradation mechanism and slow degradation rate, and achieve the effects of rapid degradation, excellent mechanical properties and thermal properties

Pending Publication Date: 2021-12-17
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the degradation mechanism of such degradable materials is single, resulting in a slow overall degradation rate

Method used

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  • Degradable bio-based polyester as well as preparation method, degradation method and application thereof
  • Degradable bio-based polyester as well as preparation method, degradation method and application thereof
  • Degradable bio-based polyester as well as preparation method, degradation method and application thereof

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preparation example Construction

[0056] The present invention also provides a kind of preparation method of described degradable bio-based polyester, comprising:

[0057] S1, itaconic acid or its esterified product, dibasic acid with 3-20 carbon atoms having a ring structure or its esterified product, dihydric alcohol with 2-20 carbon atoms, esterification catalyst, polymerization inhibitor The reagents are mixed and subjected to an esterification reaction to obtain the first intermediate product, wherein the mole of the itaconic acid or its esterified product and the dibasic acid with a ring structure of 3-20 carbon atoms or its esterified product The ratio is 1:1-1:9;

[0058] S2, performing a polycondensation reaction on the first intermediate product to obtain a degradable bio-based polyester.

[0059] The itaconic acid produced by biological fermentation has an aliphatic segment structure, so itaconic acid or its esters can be used to prepare bio-based polyesters, however, due to the poor structural reg...

Embodiment 1

[0088]Add dimethyl terephthalate, dimethyl itaconate, and 1,4-butanediol into the reactor according to the molar ratio of 0.7:0.3:1.6, and then add dimethyl terephthalate in a molar amount of 4‰ The esterification catalyst anhydrous zinc acetate and 10‰ polymerization inhibitor p-hydroxyanisole, under the condition of nitrogen protection, the temperature was gradually raised to 170°C for esterification reaction for 3 hours, and then the molar amount of dimethyl terephthalate was added 5.0‰ polycondensation catalyst antimony trioxide and 3.0‰ stabilizer trimethyl phosphate, gradually increase the temperature to 210°C, gradually reduce the vacuum degree to 10Pa, and react for 3 hours to obtain polybutylene terephthalic acid / itaconate Ester, its structure is as shown in formula (1-1):

[0089]

[0090] Wherein, x, y, and m are all integers, x=1-10, y=1-10, m=20-100.

[0091] The polybutylene terephthalate / itaconate was subjected to tests such as proton nuclear magnetic resona...

Embodiment 2

[0096] Add dimethyl 2,5-furandicarboxylate, itaconic acid, and neopentyl glycol into the reactor in a molar ratio of 0.7:0.3:1.4, and then add dimethyl 2,5-furandicarboxylate in a molar amount of 4‰ The esterification catalyst is anhydrous zinc acetate and 6‰ polymerization inhibitor hydroquinone, under the condition of nitrogen protection, the temperature is gradually raised to 165°C for esterification reaction for 4 hours, and then dimethyl 2,5-furandicarboxylate is added The polycondensation catalyst dibutyl tin oxide with a molar weight of 5.0‰ and the stabilizer trimethyl phosphate of 3.0‰ are gradually heated up to 200°C, the vacuum degree is gradually reduced to 15Pa, and the reaction is carried out for 4 hours to obtain new polyfurandicarboxylic acid / itaconic acid Pentylene glycol ester, its structure is shown in formula (1-2):

[0097]

[0098] Wherein, x, y, and m are all integers, x=1-10, y=1-10, m=20-100.

[0099] It can be seen from the proton nuclear magnetic...

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Abstract

The invention relates to degradable bio-based polyester as well as a preparation method, a degradation method and application thereof. The structural formula of the degradable bio-based polyester is shown in a formula (1) defined in the description. In the formula (1), -O-R1-O- is a structural unit of dihydric alcohol with the carbon atom number of 2-20, -R2- is a structural unit of binary acid with the carbon atom number of 3-20 and a cyclic structure or an ester thereof, x, y and m are all integers, x is equal to 1-10, y is equal to 1-10, and m is equal to 20-100; and the molar ratio to -R2- is 1: 1 to 1: 9. The degradable bio-based polyester disclosed by the invention is excellent in mechanical property and thermal property, not only can be hydrolyzed and hydrolyzed under enzyme catalysis, but also can be degraded under the initiation of amine, and can be applied to plastic products to solve the problem of plastic pollution.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a degradable bio-based polyester and its preparation method, degradation method and application. Background technique [0002] Traditional degradable materials use hydrolysis or enzyme-catalyzed hydrolysis as the main degradation mechanism, such as polylactic acid, polybutylene succinate, polyglycolic acid, polycaprolactone, polybutylene terephthalate adipate Esters etc. However, the degradation mechanism of such degradable materials is single, resulting in a slow overall degradation rate. Contents of the invention [0003] Based on this, it is necessary to provide a degradable bio-based polyester and its preparation method, degradation method and application for the above problems; the degradable bio-based polyester has excellent mechanical properties and thermal properties, and its degradation method not only Including hydrolysis, enzyme-catalyzed hydrolysis, and ...

Claims

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Application Information

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IPC IPC(8): C08G63/52C08G63/676C08J11/28C08J11/14C08L67/06
CPCC08G63/52C08G63/676C08J11/28C08J11/14C08J2367/06Y02W30/62
Inventor 胡晗田莹王静刚张若愚朱锦
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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