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High-resilience polylactic acid segmented copolymer and preparation method thereof

A technology of block copolymer and polylactic acid, which is applied in the field of high resilience polylactic acid block copolymer and its preparation, can solve the problems of complex molecular structure, difficulty in consistent block structure, poor high resilience and the like

Active Publication Date: 2020-12-11
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The inventor prepared a thermoplastic aliphatic-aromatic copolyester elastomer (201811047949.1), which has certain toughness and rebound properties, but the high resilience is not good
At present, the preparation methods of high resilience elastomers mainly focus on the preparation of block copolymers by means of ionic polymerization. The polymers prepared by this method generally contain a mixture of block copolymers and homopolymers, that is, the actual synthetic molecular structure Relatively complex, difficult to agree with the ideal block structure

Method used

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  • High-resilience polylactic acid segmented copolymer and preparation method thereof
  • High-resilience polylactic acid segmented copolymer and preparation method thereof
  • High-resilience polylactic acid segmented copolymer and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0035]Add 0.48mol (43.26g) of 1,4-butanediol, 0.06mol (7.1g) of succinic acid and 0.06mol (15.49g) of diphenyl ether dicarboxylic acid into a stirring device with a condensing 250ml three-necked flask of a device and a nitrogen protection device; 0.2g of catalyst tetrabutyl titanate (0.5% of the molar amount of the acid monomer) was added dropwise into the three-necked flask. Open the condensate, pass into N 2 , heated up to 180°C, and after the monomers were completely melted, the esterification reaction was carried out with constant temperature stirring for 3-4 hours to complete the esterification reaction stage; then the condensing device was removed and replaced with a pump equipped with a safety bottle, a McGauge vacuum gauge and an oil pump Vacuum device, conduct polycondensation stage, heat up to 220°C, continue reaction for 3 hours, system vacuum degree is 50-80Pa, collect product at room temperature, dissolve product with chloroform, precipitate with methanol, filter ...

Embodiment 2

[0038] Add 0.48mol (43.26g) of 1,4-butanediol, 0.06mol (7.1g) of succinic acid and 0.06mol (15.49g) of diphenyl ether dicarboxylic acid into a stirring device with a condensing 250ml three-necked flask of a device and a nitrogen protection device; 0.2g of catalyst tetrabutyl titanate (0.5% of the molar amount of the acid monomer) was added dropwise into the three-necked flask. Open the condensate, pass into N 2 , heated up to 180°C, and after the monomers were completely melted, the esterification reaction was carried out with constant temperature stirring for 3-4 hours to complete the esterification reaction stage; then the condensing device was removed and replaced with a pump equipped with a safety bottle, a McGauge vacuum gauge and an oil pump Vacuum device, carry out polycondensation stage, heat up to 220°C, continue to react for 4 hours, the vacuum degree of the system is 50-80Pa, collect the product at room temperature, dissolve the product in chloroform, precipitate wi...

Embodiment 3

[0041] Add 0.48mol (43.26g) of 1,4-butanediol, 0.06mol (7.1g) of succinic acid and 0.06mol (15.49g) of diphenyl ether dicarboxylic acid into a stirring device with a condensing 250ml three-necked flask of a device and a nitrogen protection device; 0.2g of catalyst tetrabutyl titanate (0.5% of the molar amount of the acid monomer) was added dropwise into the three-necked flask. Open the condensate, pass into N 2 , heated up to 180°C, and after the monomers were completely melted, the esterification reaction was carried out with constant temperature stirring for 3-4 hours to complete the esterification reaction stage; then the condensing device was removed and replaced with a pump equipped with a safety bottle, a McGauge vacuum gauge and an oil pump Vacuum device, carry out polycondensation stage, heat up to 220°C, continue the reaction for 5 hours, the system vacuum is 50-80Pa, collect the product at room temperature, dissolve the product in chloroform, precipitate with methano...

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Abstract

The invention relates to a high-resilience polylactic acid segmented copolymer and a preparation method thereof, and relates to the technical field of high polymer material synthesis. The invention discloses an ABA (Acrylonitrile Butadiene Styrene) type triblock copolymer (PLAbPBSObPLA) of polylactic acid-b-poly (butylene succinate-co-diphenyl ether dicarboxylate) ester-b-polylactic acid. The preparation method comprises the following steps: preparing hydroxyl-terminated poly (butylene succinate-co-diphenyl ether dicarboxylic acid butanediol) ester by taking 1, 4-butanediol, succinic acid anddiphenyl ether dicarboxylic acid as raw materials, and performing ring-opening polymerization reaction on hydroxyl-terminated polyester serving as a macromolecular initiator and lactide (LA) to prepare the polylactic acid segmented copolymer. The method is simple to operate, can perform polymerization through a common device, and is easy for industrial production. The block copolymer obtained by the invention has excellent resilience and biodegradability, conforms to the development trend of resource-saving and environment-friendly high polymer materials, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a high resilience polylactic acid block copolymer and a preparation method thereof. [0002] technical background [0003] Due to the existence of polymer segments with different properties in the structure of block copolymers, microphase separation is formed, showing very unique properties. It has a wide range of applications in many fields, especially as a thermoplastic elastomer, binder and surfactant, and has attracted much attention. [0004] As a block-type thermoplastic elastomer, its structure needs to meet two points: ①It consists of a large number of soft blocks and a small amount of hard blocks. The soft and hard blocks do their job, with the soft block providing pliable elasticity while the hard block provides strength and stiffness. ②ABA type only or (A-B) n Only multi-block copolymers with a type structure exhibit good resilience. In the mul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/08C08G63/66C08G63/672
CPCC08G63/08C08G63/66C08G63/672
Inventor 赵彩霞余苗苗许愿李锦春杨荣宋艳
Owner CHANGZHOU UNIV
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