Self-repairing polyester based on multiple hydrogen bonds as well as preparation method and application thereof

A multiple hydrogen bond and self-repairing technology is applied in the preparation of self-repairing polyester and in the field of polyester preparation, which can solve the problems of difficult mechanical strength and self-repairing cycle of polyurethane, and achieves novel preparation method, strong practicability, and high production efficiency. simple method effect

Active Publication Date: 2020-08-11
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventors found that it is difficult for the current self-healing polyurethane to have high mechanical strength and self-healing cycles at room temperature.

Method used

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  • Self-repairing polyester based on multiple hydrogen bonds as well as preparation method and application thereof
  • Self-repairing polyester based on multiple hydrogen bonds as well as preparation method and application thereof
  • Self-repairing polyester based on multiple hydrogen bonds as well as preparation method and application thereof

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preparation example Construction

[0032] The present invention also provides a preparation method of polyester with self-repair function, comprising:

[0033] Poly(butylene itaconate-co-butylene succinate) (PBIS) and UPy-NCO supramolecular polymer were used as raw materials, and 2-mercaptoethanol was used as chain extender through mercapto-ene click reaction. UPy was grafted into PBIS to obtain an unsaturated polyester (PBIS-U) containing UPy in side groups. At the same time, the UPy-NCO supramolecular polymer was grafted onto the terminal hydroxyl groups of polyethylene glycol (PEG-2000) to obtain UPy-terminated polyethylene glycol (PEG-U). After the reaction is complete, the unsaturated polyester (PBIS-U) containing UPy in the side group (PBIS-U) and the polyethylene glycol (PEG-U) blocked by UPy are mixed, and UPy (2-urea-4[H]-pyrimidinone) is used to The system can form dimerization and cross-link through the action of quadruple hydrogen bond to obtain cross-linked polyester.

[0034] The self-healing pe...

Embodiment 1

[0049] Weigh 10g of poly(butylene itaconate-co-butylene succinate) (PBIS) and dissolve it in a three-necked flask filled with 50mL of chloroform, then slowly add 2-mercaptoethanol dropwise while stirring, the amount It is 80% of the double bond content in PBIS, and a photoinitiator DMPA (benzoin dimethyl ether) is added in an amount of 0.15% of the PBIS mass. Then, it was stirred under a nitrogen atmosphere for 30 min and irradiated with a UV lamp for 1 h at room temperature, at which time 2-mercaptoethanol was grafted into PBIS via a mercapto-ene click reaction. Then, add UPy-NCO into the flask, the addition amount is 80% of the double bond content in PBIS, use chloroform solution as solvent, connect spherical condenser, thermometer and stirrer, raise the temperature to 80°C under nitrogen protection and stir. After 4 hours, an unsaturated polyester (PBIS-U) containing UPy in side groups was obtained.

[0050] Put polyethylene glycol and UPy-NCO with a molar ratio of 1:2 in ...

Embodiment 2

[0053] Weigh 10g of poly(butylene itaconate-co-butylene succinate) (PBIS) and dissolve it in a three-necked flask filled with 50mL of chloroform, then slowly add 2-mercaptoethanol dropwise while stirring, the amount It is 20% of the double bond content in PBIS, and the photoinitiator DMPA is added in an amount of 0.15% of the mass of PBIS. Then, it was stirred under a nitrogen atmosphere for 30 min and irradiated with a UV lamp for 1 h at room temperature, at which time 2-mercaptoethanol was grafted into PBIS via a mercapto-ene click reaction. Then, add UPy-NCO into the flask, the addition amount is 20% of the double bond content in PBIS, use chloroform solution as solvent, connect spherical condenser, thermometer and stirrer, raise the temperature to 80°C under nitrogen protection and stir. After 4 hours, an unsaturated polyester (PBIS-U) containing UPy in side groups was obtained.

[0054] Put polyethylene glycol and UPy-NCO with a molar ratio of 1:2 in a 100ml four-necked ...

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Abstract

The invention relates to self-repairing polyester based on multiple hydrogen bonds as well as a preparation method and application of the self-repairing polyester, and belongs to the field of polymerpreparation. The method comprises the following steps: grafting and introducing a UPy-NCO supramolecular polymer on a side chain of poly (butylene itaconate-co-butylene succinate) ester (PBIS) througha sulfydryl-alkene click reaction; meanwhile, grafting and introducing UPy-NCO (supramolecular polymer) into terminal hydroxyl of polyethylene glycol (PEG-2000), and then forming dimerization throughthe action of quadruple hydrogen bonds, so that a cross-linked network is obtained. The preparation method of the self-repairing polyester is novel, UPy-NCO is introduced to a side chain of poly (butylene itaconate-co-butylene succinate) ester (PBIS) by utilizing thiol-ene click reaction grafting, and the polyester with great self-repairing capability and mechanical strength is prepared. And thecost of the selected raw materials is low, and the market prospect is wide. The steps are simple, operation is convenient, and practicability is high.

Description

technical field [0001] The invention relates to a method for preparing polyester, in particular to a method for preparing self-repairing polyester based on multiple hydrogen bonds, and belongs to the field of polymer preparation. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Polyester is a polymer prepared by polycondensation reaction of polycarboxylic acid and polyol. According to the degree of saturation of its molecular chain, aliphatic polyester polyol can be divided into saturated polyester polyol and unsaturated polyester polyol. . Saturated aliphatic polyester polyols are aliphatic polyesters that do not contain unsaturated segments in the molecular structure te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/06C08L71/02C08J3/24C08J5/18C08G63/91C08G65/333
CPCC08J3/246C08J5/18C08G63/916C08G65/33396C08G65/33344C08J2367/06C08J2471/02
Inventor 高传慧王思凯董亚洁刘月涛赵文鹏武玉民
Owner QINGDAO UNIV OF SCI & TECH
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