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Biodegradable polyester with high gas barrier property and preparation method and application thereof

A biodegradable polyester, gas barrier technology, used in biological packaging, polyester coatings, flexible coverings, etc., can solve the side reaction of biodegradable polyester discoloration, the product turns red or orange, and increase production costs, etc. problems, to achieve the effect of industrialized production and application, high-performance color, process energy saving and environmental protection

Active Publication Date: 2020-10-30
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] On the other hand, some biodegradable polyesters are prone to severe discoloration side reactions during the synthesis process, for example, PBAT is prone to discoloration during its melt polycondensation synthesis, causing the product to turn red or orange
Although discoloration can be better suppressed by using special catalysts, adding stabilizers and optimizing process conditions, it obviously increases the production cost

Method used

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  • Biodegradable polyester with high gas barrier property and preparation method and application thereof
  • Biodegradable polyester with high gas barrier property and preparation method and application thereof
  • Biodegradable polyester with high gas barrier property and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) Add 28.94g (0.198mol) of adipic acid, 26.91g (0.162mol) of terephthalic acid and 64.89g (0.72mol) of 1,4-butanediol in a 250mL four-necked flask, wherein the acid-alcohol ratio is 1:2, under the protection of nitrogen atmosphere and mechanical stirring, when the esterification temperature reaches 180°C, add 0.12g (0.21wt%, based on the amount of dibasic acid) catalyst n-tetrabutyl titanate, and the system is at 180°C The reaction was carried out at low temperature for about 2 hours, and the temperature was raised to 215°C to react until the distillate water no longer increased, and the system was clear and transparent, and prepolymer 1 was obtained.

[0055] Add 9.73g (0.108mol) 1,4-butanediol and 7.40g (0.0250mol) sodium dimethyl isophthalate-5-sulfonate to a 25mL three-necked flask (dimethyl isophthalate-5-sulfonate Sodium acid sodium accounts for 6.5mol% of the sum of the moles of all dibasic acids and dibasic acid diesters), the ester-alcohol ratio is 1: 4.33, u...

Embodiment 2

[0059] (1) Add 28.94g (0.198mol) of adipic acid, 26.91g (0.162mol) of terephthalic acid and 64.89g (0.72mol) of 1,4-butanediol in a 250mL four-necked flask, wherein the acid-alcohol ratio is 1:2, in the case of nitrogen atmosphere protection and mechanical stirring, when the esterification temperature reaches 180°C, add 0.12g (0.21wt%, based on the amount of dibasic acid) catalyst n-tetrabutyl titanate, the system is at 180°C The reaction was carried out at low temperature for about 2 hours, and the temperature was raised to 215°C to react until the distillate water no longer increased, and the system was clear and transparent, and prepolymer 1 was obtained.

[0060] Add 11.26g (0.125mol) 1,4-butanediol and 8.55g (0.0289mol) sodium dimethyl isophthalate-5-sulfonate to a 25mL three-necked flask (dimethyl isophthalate-5-sulfonate Sodium acid sodium accounts for 7.4mol% of the sum of the moles of all dibasic acids and dibasic acid diesters), wherein the ester-alcohol ratio is 1: ...

Embodiment 3

[0064] (1) Add 28.94g (0.198mol) of adipic acid, 26.91g (0.162mol) of terephthalic acid and 64.89g (0.72mol) of 1,4-butanediol in a 250mL four-necked flask, wherein the acid-alcohol ratio is 1:2, under the protection of nitrogen atmosphere and mechanical stirring, when the esterification temperature reaches 180°C, add 0.12g (0.21wt%, based on the amount of dibasic acid) catalyst n-tetrabutyl titanate, and the system is at 180°C The reaction was carried out at low temperature for about 2 hours, and the temperature was raised to 215°C to react until the distillate water no longer increased, and the system was clear and transparent, and prepolymer 1 was obtained.

[0065] Add 12.80g (0.142mol) 1,4-butanediol and 9.73g (0.0328mol) dimethyl isophthalate-5-sodium sulfonate to a 25mL three-necked flask (dimethyl isophthalate-5-sulfone Sodium acid sodium accounts for 8.4mol% of the sum of the moles of all dibasic acids and dibasic acid diesters), wherein the acid-alcohol ratio is 1: 4...

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PUM

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Abstract

The invention discloses a biodegradable polyester with high gas barrier property and a preparation method and application of the biodegradable polyester. The biodegradable polyester comprises a binaryacid structural unit and a dihydric alcohol structural unit, wherein in terms of 100 mol% of the total amount of the dibasic acid structural units, the dibasic acid structural units comprise 80-94 mol% of non-sulfonic dibasic acid residues and 6-20 mol% of sulfonic dibasic acid residues, and the sum of the aromatic sulfonic dibasic acid residues and the aromatic non-sulfonic dibasic acid residuesaccounts for 0-60 mol% of the total amount of dibasic acid structural units. The biodegradable sulfonated polyester has the advantages of being high in gas barrier property, light in color and lusterand the like, the raw materials of the preparation method are easy to obtain, the process is energy-saving and environment-friendly, discoloration side reactions of products in the polymerization process can be inhibited, and industrialization is achieved through utilization.

Description

technical field [0001] The invention relates to the field of biodegradable polymer materials, in particular to a biodegradable polyester with high gas barrier property and its preparation method and application. Background technique [0002] Since it is difficult to degrade into harmless products in the natural environment, the large-scale application and disposal of traditional plastic products, especially disposable plastic products, has led to more and more serious environmental problems, such as water / soil quality deterioration, marine pollution, and microplastic pollution. [0003] Aliphatic polyesters and aliphatic-aromatic copolyesters with suitable compositions are a class of polymers that can be degraded into harmless carbon dioxide and water under the action of microorganisms and water, that is, biodegradable polymers. Replacing traditional non-degradable polymers with biodegradable polymers is the most powerful measure to solve plastic pollution at the source. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/688C08L67/02C09D167/02B65D65/46
CPCB65D65/466C08G63/6886C08G2230/00C08L67/02C08L2201/06C08L2201/14C09D167/02Y02W90/10
Inventor 吴林波黄芳芳李伯耿
Owner ZHEJIANG UNIV
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