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Self-repairing graft copolymer based on hydrogen bond action and preparation method of self-repairing graft copolymer

A technology of graft copolymer and hydrogen bond, which is applied in the field of thermoplastic elastomer, self-healing graft copolymer and preparation based on hydrogen bond, which can solve the problem of high requirements and the lack of self-healing function of thermoplastic superelastomer materials, etc. problems, to achieve the effect of high elastic recovery rate, mild reaction conditions and good mechanical strength

Active Publication Date: 2018-10-12
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high vacuum anionic polymerization has higher requirements on the reaction environment, and more importantly, the thermoplastic superelastomer material prepared by this method does not have self-healing function

Method used

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  • Self-repairing graft copolymer based on hydrogen bond action and preparation method of self-repairing graft copolymer
  • Self-repairing graft copolymer based on hydrogen bond action and preparation method of self-repairing graft copolymer
  • Self-repairing graft copolymer based on hydrogen bond action and preparation method of self-repairing graft copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] 1) The polymer macromonomer whose end group is a double bond is prepared: the preparation process of the poly-2-acetamidomethyl acrylate macromonomer of the single-tail structure is as follows:

[0068] First, the macromolecular initiator is prepared by atom transfer radical polymerization, and the specific process is as follows: Weigh 0.13 g of the initiator 2-bromopropionate ethyl ester, 0.12 g of the catalyst cuprous bromide, and the ligands N, N, N, N , N-pentamethyldivinyltriamine 0.12g, 2-acetamidomethyl acrylate 5g, N,N-dimethylformamide 15g, and the above-mentioned reactants were added to the reactor, and the reactants in the reactor were After deoxygenation treatment, it was sealed, and then the reactor was transferred to an oil bath at 100°C. After 8 hours of reaction, a bromo-terminated poly-2-acetamidomethyl acrylate macromolecular initiator with a molecular weight of about 6400g / mol was obtained. .

[0069] Take respectively 4g of the bromo-terminated poly...

Embodiment 2

[0073] 1) The preparation of terminal groups is a polymer macromonomer with a double bond: the preparation process of the poly-2-acetamidomethyl acrylate macromonomer of the double-tailed structure is as follows:

[0074] Firstly, the macromolecular initiator is prepared by atom transfer radical polymerization, and the specific process is as follows: Weigh 0.2 g of the initiator 2-bromopropionate ethyl ester, 0.1 g of the catalyst cuprous bromide, and the ligands N, N, N, N , N-pentamethyldivinyltriamine 0.12g, 2-acetamidomethyl acrylate 5g, N,N-dimethylformamide 15g, and the above-mentioned reactants were added to the reactor, and the reactants in the reactor were Seal it after deoxygenation treatment, then transfer the reactor to an oil bath at 100°C, and react for 8 hours to obtain a bromo-terminated poly-2-acetamidomethyl acrylate macroinitiator with a molecular weight of about 4500g / mol .

[0075] Take 4g of bromo-terminated poly-2-acetamidomethyl acrylate macroinitiator...

Embodiment 3

[0079] 1) The polymer macromonomer whose terminal group is a double bond is prepared: the preparation process of the poly-2-acetamidomethyl acrylate macromonomer of the three-tail structure is as follows:

[0080]First, the macromolecular chain transfer agent is prepared by reversible-addition-fragmentation chain transfer polymerization, and the specific process is as follows: Weigh the chain transfer agent 2-(dodecyltrithiocarbonate)-2-methylpropionic acid 0.6g, 5g of 2-acetamidomethyl acrylate, 0.11g of azobisisobutyronitrile, 40g of N,N-dimethylformamide, and the above-mentioned reactants used are added to the reactor, and the reactants in the reactor are After deoxygenation treatment, it was sealed, and then the reactor was transferred to an oil bath at 70°C. After reacting for 8 hours, a carboxyl-terminated polymethyl-2-acetamidoacrylate macromolecular chain transfer agent with a molecular weight of about 3100 g / mol was obtained.

[0081] Take 4g of carboxyl-terminated po...

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Abstract

The invention discloses a self-repairing graft copolymer based on a hydrogen bond action and a preparation method of the self-repairing graft copolymer and belongs to the technical field of polymer materials. The preparation method comprises the following steps: 1) preparing a polymer macromonomer of which the end group is provided with double bonds; and 2) preparing the self-repairing graft copolymer, namely carrying out a free radical polymerization reaction on a second monomer and the polymer macromonomer of which the end group is provided with the double bonds in the step 1) under the action of a free radical polymerization initiator to prepare the self-repairing graft copolymer with a "comb-type" structure or a "centipede-type" structure or a "three-chain-type" structure or a "barbed-wire-type" structure. The self-repairing graft copolymer has relatively good thermodynamic properties and a self-repairing function.

Description

technical field [0001] The invention relates to a thermoplastic elastomer and belongs to the technical field of polymer materials, in particular to a self-healing graft copolymer based on hydrogen bond interaction and a preparation method thereof. Background technique [0002] Thermoplastic elastomer is a special polymer material, which is both elastic and plastic, and can be widely used in important fields of the national economy such as packaging materials, auto parts, adhesives, clothing, and biomedicine. However, thermoplastic elastomers are subjected to alternating stress for a long time during use, which causes fatigue cracks inside the elastomer and leads to early failure of the elastomer, shortening the service life of the elastomer. [0003] Polymer self-healing material imitates the principle of biological damage healing, finds cracks by itself and heals itself through a certain mechanism. It is a polymer smart material with wide application requirements. In recen...

Claims

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Application Information

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IPC IPC(8): C08F285/00C08F271/00C08F265/04C08F230/08C08F126/02C08F120/36C08F220/18C08F212/14C08F216/14C08F2/38
CPCC08F2/38C08F120/36C08F126/02C08F265/04C08F271/00C08F285/00C08F230/08C08F212/14C08F216/1458C08F220/1804
Inventor 王雯雯王栋张志锋徐得立刘轲鲁振坦王跃丹
Owner WUHAN TEXTILE UNIV
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