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Preparation and restoration methods for thermally-reversible self-repairing polymeric material

A polymer material and self-healing technology, applied in the field of organic polymers, can solve problems such as shortening the service life, and achieve the effects of strong practicability, simple preparation process and simple process

Inactive Publication Date: 2018-05-01
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the comprehensive damage of external factors, the micro-cracks generated inside these materials will shorten their service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Add lauryl methacrylate 2g, chain transfer agent cyanoisopropyl dithiobenzoate 0.009g, solvent tetrahydrofuran 2g and initiator AIBN 0.0050g in the reactor, carry out polymerization reaction under nitrogen environment, 70 After reacting at ℃ for 5 hours, the obtained polymer was precipitated and dried several times to obtain polymer A;

[0022] (2) Add 1g of polymer A, 2.5g of solvent tetrahydrofuran, 0.002g of initiator AIBN and 1.5g of furfuryl methacrylate into the reactor, and carry out the polymerization reaction under nitrogen atmosphere. After 4 hours of reaction at 70°C, the obtained polymerization The product was precipitated and dried several times to obtain block copolymer B;

[0023] (3) Add 1g of block copolymer B, 2.0g of solvent tetrahydrofuran, and 0.5g of diphenylmethylenebismaleimide (BMI) into the reactor to react at 70°C. The obtained pre-finished product is poured into a mold and dried to obtain a polyacrylate material C with self-repairing int...

Embodiment 2

[0026] (1) Add 1.8g of butyl methacrylate, 0.01g of chain transfer agent cyanoisopropyl dithiobenzoate, 1.8g of solvent tetrahydrofuran and 0.0040g of initiator AIBN in the reactor, and carry out polymerization reaction under nitrogen atmosphere , after reacting at 70°C for 6 hours, the obtained polymer was precipitated and dried several times to obtain polymer A;

[0027] (2) Add 1g of polymer A, 2.0g of solvent tetrahydrofuran, 0.002g of initiator AIBN and 2g of furfuryl methacrylate into the reactor, and carry out polymerization reaction under nitrogen atmosphere. After reacting at 70°C for 4h, the obtained polymer Precipitate and dry several times to obtain block copolymer B;

[0028] (3) Add 1g of block copolymer B, 2.0g of solvent tetrahydrofuran, and 0.5g of diphenylmethylenebismaleimide (BMI) into the reactor to react at 70°C. The obtained pre-finished product is poured into a mold and dried to obtain a polyacrylate material C with self-repairing intelligent propertie...

Embodiment 3

[0031] (1) Add 2.4g of octadecyl methacrylate, 0.008g of chain transfer agent cyanoisopropyl dithiobenzoate, 2.4g of solvent tetrahydrofuran and 0.0040g of initiator AIBN in the reactor, under nitrogen atmosphere Carry out a polymerization reaction, and after reacting at 80°C for 4 hours, the obtained polymer is precipitated and dried several times to obtain Polymer A;

[0032] (2) Add 1.5g of polymer A, 2.0g of solvent tetrahydrofuran, 0.002g of initiator AIBN and 1.5g of furfuryl methacrylate into the reactor, carry out the polymerization reaction under nitrogen atmosphere, and react at 70°C for 4h, the obtained The polymer is precipitated and dried several times to obtain a block copolymer B;

[0033] (3) Add 1.2g of block copolymer B, 2.4g of solvent tetrahydrofuran, and 0.5g of diphenylmethylenebismaleimide (BMI) into the reactor to react at 80°C. The prepared pre-finished product is poured into a mold and dried to obtain a polyacrylate material C with self-repairing int...

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PUM

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Abstract

The invention discloses preparation and restoration methods for a thermally-reversible self-repairing polymeric material. The material is prepared from 40 to 60 parts of furfuryl methacrylate and oneselected from a group consisting of lauryl methacrylate, octadecyl methacrylate, tetrahydrofurfuryl methacrylate and butyl methacrylate through reversible addition-fragmentation chain transfer (RAFT)polymerization at 60 to 80 DEG C. A prepared segmented copolymer is subjected to a reaction with 10 to 20 parts of diphenylmethylene bismaleimide at 60 to 80 DEGC, and then a pre-finished product obtained after completion of the reaction is poured into a mold for drying so as to obtain a polyacrylate material with a thermally-reversible Diels-Alder bond on its side chain and with the characteristic of self-repairing. In the presence of inert gas, a damaged material is subjected to heat treatment at 90 to 110 DEG C for 10 to 30 min and then cooled to room temperature, and the damaged material is repaired through combined action of Diels-Alder and retro-DA reactions. The material has high self-repairing efficiency, can theoretically realize multiple self-repairing at a same site and does notneed extra catalyst.

Description

technical field [0001] The invention relates to the technical field of organic polymers, in particular to a method for preparing and repairing a thermally reversible self-repairing polymer material. Background technique [0002] Polymer materials are susceptible to comprehensive damage from external factors during processing and use, and internal microcracks will reduce the mechanical properties of the material and shorten its service life. As a novel intelligent structural functional material, self-healing polymer materials can realize the self-healing of microcracks in the material itself by simulating the mechanism of biological damage healing, avoiding further damage, and prolonging the service life of the material. [0003] At present, there are many self-healing methods for polymer materials, among which implanting thermally reversible Diels-Alder (DA) covalent bonds in the bulk structure of polymer materials is a more effective method. After the material with thermal...

Claims

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Application Information

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IPC IPC(8): C08F293/00C08F220/18C08F220/32C08F8/30
CPCC08F8/30C08F220/18C08F220/1804C08F220/1812C08F220/1818C08F220/32C08F293/00
Inventor 王春鹏郭腾飞储富祥
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY