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Force-induced responsive polymer with cross-linked structure

A technology of cross-linked polymers and cross-linked structures, applied in the field of cross-linked polymers, can solve problems such as difficult to reflect responsiveness and dynamics, and difficult to meet the needs of material development

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 polymer with cross-linked structure
  • Force-induced responsive polymer with cross-linked structure
  • Force-induced responsive polymer with cross-linked structure

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[2163] In the preparation process of the polymer, three methods of mechanical foaming, physical foaming and chemical foaming are mainly used to foam it.

[2164] Among them, the mechanical foaming method is to introduce a large amount of air or other gases into the emulsion, suspension or solution of the polymer with the help of strong stirring during the preparation of the polymer to make it a uniform foam, and then through physical or Chemical changes shape it into foam. In order to shorten the molding cycle, air can be introduced and emulsifiers or surfactants can be added.

[2165] Wherein, the physical foaming method is to use physical principles to realize the foaming of the polymer during the preparation of the polymer, which includes but is not limited to the following methods: (1) inert gas foaming method, that is, under pressure Under normal circumstances, the inert gas is pressed into the molten polymer or pasty material, and then the pressure is reduced and the te...

Embodiment 1

[2181]

[2182] With 1 molar equivalent of thiophene spirooxazine sensitizing group compound (a), 0.6 molar equivalent of 2-bromoisobutyric acid, using dichloromethane as solvent, and adding 0.01 molar equivalent of N,N-isopropylcarbodiimide, 0.01 molar equivalent of diphenyl-4-phenylthiophenylsulfonium salt, stirring the reaction system at room temperature for 24 hours, and removing the solvent to obtain compound (b). Get 0.1 molar equivalent of compound (b), 20 molar equivalents of butyl acrylate and add in the reactor, 1wt% glass fiber, with DMSO as solvent, hexamethylated tris (2-aminoethyl) amine and copper as catalyst, react The solution was stirred at room temperature for 24 hours to remove solvent and impurities to obtain product 1; using dicumyl peroxide as an initiator, graft-modified low-molecular-weight polyethylene with maleic anhydride by melt grafting reaction to obtain graft-modified Polyethylene (c), wherein the mass ratio of dicumyl peroxide and maleic anh...

Embodiment 2

[2184]

[2185] 1 molar equivalent compound (a), 20 molar equivalent compound (b), 0.5 molar equivalent polyethylene glycol (molecular weight 1000) and 5wt% nano Fe 3 o 4 Put the particles into the reactor, use dichloromethane as the solvent, stir well and add 0.01 molar equivalent of N,N-isopropylcarbodiimide, 0.01 molar equivalent of diphenyl-4-phenylthiophenylsulfonium Salt, the reaction was stirred at room temperature for 24h. After the reaction is finished, the reaction solution is poured into the mold, and the solvent is removed to obtain polysiloxane crosslinked particles. Take 10 molar equivalents of compound (b) and 5 molar equivalents of polysiloxane cross-linked particles and place them in a reactor, use dichloromethane as a solvent, stir and mix evenly, control the particles at the bottom by a magnet, and pour them into the reactor Add 0.01 molar equivalent of bis(acetylacetonate) di-n-butyltin and 0.5 molar equivalent of dimethylsiloxane, continue the reactio...

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Abstract

The invention discloses a force-induced responsive polymer with a cross-linked structure. The invention is characterized in that the polymer contains at least one covalent cross-linked network of which the cross-linking degree is above a gel point and optionally contains a supramolecular cross-linked network, and non-cross-linked polymers and / or cross-linked polymer particles containing at least one force-sensitive group are dispersed in the at least one cross-linked network; wherein a force-sensitive group is optionally contained in the cross-linked network; the dispersed non-cross-linked polymer and / or cross-linked polymer particles also optionally contain dynamic covalent bonds and / or supramolecular interaction. Covalent cross-linking endows the polymer with certain strength and stability, and supramolecular cross-linking endows the polymer with certain dynamics and reversibility; 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 force-induced responsive polymer can be widely applied as a stress sensing material, a sealing material, a toy, a coating and the like.

Description

technical field [0001] The invention relates to a cross-linked polymer, in particular to a mechanoresponsive polymer. Background technique [0002] In nature, many substances and living organisms, including organisms, have force-sensitive systems that can sense and adapt to external mechanical forces. As for the polymer material, in many application occasions, it also often has to withstand the action of external mechanical force. 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. [0003] Mechanoresponsive polymers with a cross-linked structure have specific sensing capabilities to externa...

Claims

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Application Information

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IPC IPC(8): C08J3/24C08G83/00
CPCC08G83/008C08J3/24
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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