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Force-induced responsive hybrid cross-linked dynamic polymer

A technology of hybrid cross-linking and polymers, applied in the field of Lizhi responsive hybrid cross-linking dynamic polymers, which can solve the problems of difficult to meet the needs of material development, difficult to reflect responsiveness and dynamics, etc.

Pending Publication Date: 2020-07-07
厦门天策材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional concept of polymer synthesis, new molecules are mainly designed and synthesized through common covalent bonds. Common covalent bonds endow polymers with good stability and stress-bearing capacity due to their high bond energy, but correspondingly, It is also difficult to reflect the responsiveness and dynamics to the outside world, and it is difficult to meet the development needs of materials under the new situation

Method used

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  • Force-induced responsive hybrid cross-linked dynamic polymer
  • Force-induced responsive hybrid cross-linked dynamic polymer
  • Force-induced responsive hybrid cross-linked dynamic polymer

Examples

Experimental program
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Embodiment approach

[2104] In the present invention, the dynamic polymer may have one, two or more than two glass transition temperatures, or may not have a glass transition temperature. Among them, in a preferred embodiment of the present invention, at least one of the glass transition temperatures of the dynamic polymer is higher than 100°C, more preferably all of them are higher than 100°C, the dimensional stability, mechanical strength, Good high temperature resistance, suitable for energy absorption scenarios with high requirements for stress bearing and rigidity; in another preferred embodiment of the present invention, at least one of the glass transition temperatures of the dynamic polymer is between 25°C and 100°C between 25°C and 100°C, more preferably between 25°C and 100°C, which facilitates the preparation of polymer products in the form of ordinary solids, foams, and gels above room temperature, and is suitable for energy-absorbing situations that require high mechanical strength and...

Embodiment 1

[2142]

[2143] Using dicumyl peroxide as an initiator, graft-modified low-molecular-weight polyethylene with maleic anhydride through melt grafting reaction to obtain graft-modified polyethylene, wherein the mass of dicumyl peroxide and maleic anhydride The ratio is 1:10; then, using p-toluenesulfonic acid as a catalyst, 1-aminoethylboronic acid is used to prepare boric acid graft modified polymer (b) through melt grafting reaction. Get 50g boric acid graft modified polyethylene (b), 15g ethylene-vinyl alcohol copolymer, 9g dioctyl phthalate, 15g compound (a), 6.2g stearic acid, 5.4g tribasic basic sulfuric acid Lead, 1.6g of di-n-butyltin dilaurate, and 1.2g of dimethyl silicone oil are mixed evenly, then added to a small internal mixer and kneaded for 10 minutes, then added 10g of carbon fiber and continued to knead. After completion, the kneaded material was taken out and cooled. , placed in a twin-roller machine at 150°C, pressed into thin sheets, cooled at room temper...

Embodiment 2

[2145]

[2146] Dissolve 15.2g of 2-(aminomethyl)phenylboronic acid and 15.4g of 4-amino-1,3-benzenedimethanol in 300mL deionized water / THF mixed solvent, heat to 50°C for 2h stirring and dissolving reaction, remove solvent to obtain 27.3 g of compound (b). An isocyanate-terminated prepolymer was prepared by reacting 25 g of MDI with 100 g of polyether polyol. Mix and dissolve 1 molar equivalent of compound (a) and 1 molar equivalent of compound (b) in toluene, add 0.01 molar equivalent of triethylamine, stir and heat to 80°C, slowly add 2 molar equivalents of isocyanate-terminated prepolymer, and then The reaction was continued for 2 h, and then methanol was added for capping. After the reaction was complete, the solvent was removed to obtain product 1. 1 molar equivalent of hydrogen-containing silicone oil (average molecular weight is about 20000, the molar ratio of repeating units containing silicon hydrogen to repeating units not containing silicon hydrogen is about 1:...

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Abstract

The invention discloses a force-induced responsive hybrid cross-linked dynamic polymer which is characterized by comprising at least one covalent cross-linked network, non-dynamic covalent bonds of atleast one covalent cross-linked network are covalently cross-linked above the gel point of the covalent cross-linked network, and at least one cross-linked network contains dynamic covalent cross-linking; wherein at least one force-sensitive group is contained; wherein at least one dynamic covalent bond is contained; wherein a supramolecular interaction is optionally contained. The polymer is endowed with certain strength and stability due to covalent cross-linking; due to dynamic covalent bonds, the polymer can show functional characteristics such as stimulus responsiveness, and has the effects of self-repairing, shape memory, toughening and the like on the material in a specific structure; the force-sensitive group can be chemically and / or physically changed under the action of mechanical force, so that the polymer realizes force-induced response. The dynamic polymer can be widely applied as a self-repairing material, a tough material, a sealing material, an adhesive and the like with force-induced response performance.

Description

technical field [0001] The invention relates to a mechanically responsive hybrid crosslinked dynamic polymer, in particular to a mechanically responsive hybrid crosslinked dynamic polymer composed of at least one dynamic covalent bond and at least one mechanosensitive group. Background technique [0002] The progress of material science and technology has greatly promoted the development and changes of human society. Since the beginning of the new century, the high-tech group formed by information technology, genetic engineering technology, new energy technology, aerospace technology, nanotechnology, etc. has greatly promoted the development of materials. The rapid development of science. Traditional single structural materials or functional materials can no longer meet the needs of these rapidly developing high-tech fields, and various multifunctional and intelligent materials have emerged as the times require. [0003] In nature, many substances and living organisms, incl...

Claims

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Application Information

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IPC IPC(8): C08J3/24C08L51/06C08L23/08C08K13/04C08K7/06C08K5/12C08K5/09C08K5/57
CPCC08J3/24C08L51/06C08L2205/035C08L23/0861C08K13/04C08K7/06C08K5/12C08K5/09C08K5/57
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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