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Biodegradable polyester PBIAT and preparation method thereof

A technology for degrading polyester and biology, applied in the field of polymer materials, can solve the problems of durability, poor economy, limited application field, poor opening, etc., and achieve the effect of improving environmental friendliness, fast soil degradation rate, and good toughness

Pending Publication Date: 2021-12-31
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PBAT has shortcomings such as high production cost, poor opening and poor barrier properties, which lead to limited application fields. After modification, there are still certain limitations in end use, such as poor durability and economical efficiency. Pollution, increasing scarcity of petroleum resources and rising prices have brought great challenges to the petroleum-dependent polyester industry; and the addition of isosorbide (a biomass derived from sorbitol dehydration) in PBIAT can It relieves the use of petroleum-based raw materials very well, and compared with traditional degradable materials, it has better barrier properties and opening properties, especially compared with traditional petroleum-based PBAT, it has better soil degradation speed, environmental friendliness and toughness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] According to the preparation method of PBIAT polyester of the present invention, preferably comprise:

[0020] The temperature set for the esterification reaction is preferably 170-190°C, more preferably 175-185°C, and most preferably 180°C.

[0021] The esterification reaction time is preferably 2 to 4 hours, most preferably 3 hours.

[0022] The temperature set for the polycondensation reaction is preferably 210-230°C, more preferably 215-225°C, and most preferably 220°C.

[0023] The polycondensation reaction time is preferably 2 to 6 hours, most preferably 4 hours.

[0024] According to the present invention, the catalyst is tetrabutyl titanate, and its dosage is preferably 0.1%-0.5%, more preferably 0.2%-0.4%, most preferably 0.3%.

[0025] The raw material of the biodegradable polyester PBIAT according to the present invention is a commercial product commonly used by those skilled in the art.

[0026] The following examples will further illustrate the present i...

Embodiment 1

[0028] First according to the present invention, take by weighing 3.887g of isosorbide, 21.575g of 1,4-butanediol, 18.427g of terephthalic acid and 16.210g of adipic acid, a total of 60g, fully dissolve and mix in a beaker; Put the monomer in the reaction kettle, set the esterification reaction temperature to 180°C, carry out the whole esterification reaction under nitrogen atmosphere, stop the nitrogen flow until no water is generated, and stop the reaction; cool to below 100°C and add terephthalic acid and The catalyst is 0.3% of the total mass of adipic acid, the catalyst is tetrabutyl titanate, the reaction kettle is sealed again and the reaction temperature is set at 220°C, and nitrogen gas is introduced for 2 to 3 minutes, and the first vacuum is started when the temperature is close to 220°C At this time, the temperature dropped slightly, and when it was close to 220°C, it was vacuumed for the second time to ensure that the vacuum degree was below -0.09MPa. When the temp...

Embodiment 2

[0030] First according to the present invention, take by weighing 7.578g of isosorbide, 18.709g of 1,4-butanediol, 17.961g of terephthalic acid and 15.799g of adipic acid, a total of 60g, fully dissolve and mix in a beaker; Put the monomer in the reaction kettle, set the esterification reaction temperature to 180°C, carry out the whole esterification reaction under nitrogen atmosphere, stop the nitrogen flow until no water is generated, and stop the reaction; cool to below 100°C and add terephthalic acid and The catalyst is 0.3% of the total mass of adipic acid, the catalyst is tetrabutyl titanate, the reaction kettle is sealed again and the reaction temperature is set at 220°C, and nitrogen gas is introduced for 2 to 3 minutes, and the first vacuum is started when the temperature is close to 220°C At this time, the temperature dropped slightly, and when it was close to 220°C, it was vacuumed for the second time to ensure that the vacuum degree was below -0.09MPa. When the temp...

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PUM

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Abstract

The invention provides biodegradable polyester polyadipic-terephthalic-isosorbide-butylene glycol ester (PBIAT) and a preparation method thereof, and belongs to the technical field of high polymer materials. The PBIAT polyester is prepared from the following components in percentage by mass: 27 to 23 percent of adipic acid, 31 to 26 percent of terephthalic acid, 6 to 48 percent of isosorbide and 36 to 3 percent of butanediol. The preparation method comprises the following steps: uniformly mixing the adipic acid, the terephthalic acid, the isosorbide and the butanediol, adding the mixture into a reaction kettle for reaction, adding a catalyst, raising the temperature, and carrying out condensation polymerization to obtain the PBIAT polyester. The PBIAT polyester is good in barrier property and excellent in opening performance, and compared with traditional petroleum-based PBAT, the PBIAT polyester has more excellent soil degradation speed, more excellent environmental friendliness and more excellent toughness. The PBIAT polyester is synthesized by adopting an esterification-polycondensation polymerization technology, the yield is high, the preparation method is simple, and the production process is easy to implement, environment-friendly and economical.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a polyester PBIAT and a preparation method thereof. Background technique [0002] With the progress of human society, polymer materials have developed rapidly and are widely used in all aspects of people's lives, becoming one of the essential basic materials in modern life. Most of the polymer materials currently used come from petrochemical resources, so they are also called petroleum-based polymer materials. In recent years, with people's higher and higher requirements for environmental protection and continuous emphasis on sustainable development, traditional petroleum-based polymer materials will face increasingly severe situations and unprecedented challenges in the development. Among them, it is mainly reflected in the "white pollution" problem caused by the use of a large number of plastic products, especially in the short-term use of disposable pack...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/672
CPCC08G63/672C08G2230/00
Inventor 任亮秦宜轩张明耀姜英勇郭颢冯海鹏程建斌
Owner CHANGCHUN UNIV OF TECH