Biodegradable fat-aromatic copolyester with low carboxyl content and multi-branched chain structure, and preparation method and application thereof

A technology of aromatic copolyester and carboxyl content, applied in the field of biodegradation of fat-aromatic copolyester and its preparation, can solve the problems of destroying the earth's ecological environment, product yellowing, and odor generation

Inactive Publication Date: 2020-06-12
戴清文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Since the 20th century, humans have synthesized a variety of polymer synthetic materials, such as polyethylene, polypropylene, polyvinyl chloride, styrene resin (ABS), polystyrene, polyester, etc. The emergence of these materials has greatly It is convenient for people's life, but also because these materials cannot be degraded in the environment for a long time after they are discarded, it brings the problem of "white pollution" and destroys the ecological environ...

Method used

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  • Biodegradable fat-aromatic copolyester with low carboxyl content and multi-branched chain structure, and preparation method and application thereof
  • Biodegradable fat-aromatic copolyester with low carboxyl content and multi-branched chain structure, and preparation method and application thereof
  • Biodegradable fat-aromatic copolyester with low carboxyl content and multi-branched chain structure, and preparation method and application thereof

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preparation example Construction

[0045] Another object of the embodiments of the present application is to provide a simple and feasible method for preparing a biodegradable aliphatic-aromatic copolyester with a low carboxyl group content and a multi-branched structure, which comprises the following steps:

[0046] Step 1: First, the polymerized monomer a, the polymerized monomer b, the polymerized monomer c, and the polymerized monomer d are mixed, and then the esterification reaction is carried out under the conditions of an absolute pressure of 0.1 to 0.05 MPa and a temperature of 140 to 260 ° C. When the completion rate of esterification is greater than or equal to 97%, an esterified product with a completion rate of esterification greater than or equal to 97% is obtained, and the polycondensation reaction in the next step is carried out.

[0047] Step 2: The above-mentioned ester compound is subjected to a polycondensation reaction under the conditions of an absolute pressure of 0.1 MPa to 5 Pa and a temp...

Embodiment 1

[0064] The present embodiment provides a kind of aliphatic-aromatic copolyester, which is prepared according to the following preparation method:

[0065] Weigh 4.60 kilograms of adipic acid, 4.30 kilograms of terephthalic acid, 9.30 kilograms of 1,4-butanediol, 60 grams of glycerol, 115 grams of 2-naphthoic acid, and 12 grams of tetrabutyl titanate, and add them to 30 liters of esterified In the reaction kettle, the temperature is raised to 200-250° C. in a temperature-programmed manner, and the reaction is stirred for 2-5 hours until the esterification rate reaches more than 97% to obtain an esterified product.

[0066] Transfer the esterified product to a 30-liter polycondensation kettle with a decompression device, vacuumize to an absolute pressure of 3-5Kpa under stirring, heat up to 200-250°C at the same time, stir and react for 0.5-2 hours, and further reduce the pressure to an absolute pressure of 100 ~200Pa, continue the reaction for 0.5~3 hours, judge the reaction en...

Embodiment 2

[0068] The present embodiment provides a kind of aliphatic-aromatic copolyester, which is prepared according to the following preparation method:

[0069] Weigh 4.10 kilograms of succinic acid, 4.60 kilograms of terephthalic acid, 10.00 kilograms of 1,4-butanediol, 50 grams of pentaerythritol, 90 grams of benzoic acid, 10 grams of tetraisopropyl titanate, and add them to 30 liters of esterification reaction In the kettle, the temperature is raised to 200-250° C. in a temperature-programmed manner, and the reaction is stirred for 2-5 hours until the esterification rate reaches over 97% to obtain an esterified product.

[0070] Transfer the esterified product to a 30-liter polycondensation kettle with a decompression device, vacuumize to an absolute pressure of 3-5Kpa under stirring, heat up to 200-250°C at the same time, stir and react for 0.5-2 hours, and further reduce the pressure to an absolute pressure of 100 ~200Pa, continue the reaction for 0.5~3 hours, judge the reactio...

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Abstract

The embodiment of the invention provides a biodegradable fat-aromatic copolyester with low carboxyl content and a multi-branched-chain structure, and a preparation method and an application thereof, and relates to the technical field of high polymer materials. Polymeric monomers comprise: at least one selected from C2-C36 aliphatic dibasic acids and derivatives thereof; at least one selected fromC6-C20 aromatic diacids and derivatives thereof, and heterocyclic diacids and derivatives thereof; at least one selected from C2-C20 diols; at least one selected from polyols, polybasic organic acidsand derivatives thereof; and at least one selected from organic single acids with a boiling point of not less than 200 DEG C under normal pressure. The biodegradable fat-aromatic copolyester is prepared by mixing the polymerization monomers and then carrying out esterification or ester exchange and condensation polymerization reactions, the carboxyl content of the copolymer is less than or equal to 15 mmol/kg, and the weight-average molecular weight is greater than or equal to 100,000; and the production cost is low, and the product has good biodegradability, aging resistance, excellent mechanical properties and processability and can be used for preparing various biodegradable products.

Description

technical field [0001] The present application relates to the technical field of polymer materials, in particular to a biodegradable aliphatic-aromatic copolyester with low carboxyl content and multi-branched structure, its preparation method and application. Background technique [0002] Since the 20th century, humans have synthesized a variety of polymer synthetic materials, such as polyethylene, polypropylene, polyvinyl chloride, styrene resin (ABS), polystyrene, polyester, etc. The emergence of these materials has greatly It is convenient for people's life, but also because these materials cannot be degraded in the environment for a long time after they are discarded, it brings the problem of "white pollution" and destroys the ecological environment of the earth. [0003] There are ester bonds in the main molecular chain of polyester polymer materials, which are similar to ester bonds widely present in nature (such as fats, oils, etc.), and are considered to be an import...

Claims

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Application Information

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IPC IPC(8): C08G63/672C08G63/20C08G63/189C08G63/78
CPCC08G63/189C08G63/20C08G63/672C08G63/78
Inventor 戴清文
Owner 戴清文
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