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Force-induced responsive cross-linked polymer

A technology of cross-linked polymers and polymers, applied in the field of cross-linked polymers

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

However, as the requirements for responsiveness and controllability are getting higher and higher, the function of the polymer system using a single force-sensitive group has great limitations.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[1816] In the preparation process of the polymer, three methods of mechanical foaming, physical foaming and chemical foaming are mainly used to foam it.

[1817] 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.

[1818]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 tem...

Embodiment 1

[1829]

[1830] Weigh 1 molar equivalent of compound (a) and 1 molar equivalent of compound (b), use dichloromethane as solvent, fully stir and dissolve, then place the reaction solution under a 300W ultraviolet lamp for 30min to make mercapto-alkene click reaction to produce product 1. Weigh 1 molar equivalent of polyacrylic acid (molecular weight: 1000) in a dry and clean flask, heat to 100°C to remove water and oxygen with nitrogen gas for 1 h, and add 0.01 molar equivalent of N,N-diisopropylcarbodiimide, 0.01 Molar equivalent of diphenyl-4-phenylthiophenylsulfonium salt, then add 0.2 molar equivalent of 1,10-decanediol, 0.2 molar equivalent of product 1, 0.2 molar equivalent of methanol, 5wt% plant fiber, 5wt% sulfuric acid Barium and 5wt% talc continued to react for 1 hour. After the reaction, the polymer sample was placed in a suitable mold, dried in a vacuum oven for 24 hours, and then cooled to room temperature to obtain a polyester elastomer with high elasticity. ...

Embodiment 2

[1832]

[1833] Add 5 molar equivalents of methyl acrylate, 1 molar equivalent of compound (a), 1 molar equivalent of compound (b), 0.01 molar equivalent of 1,10-decadiene, 0.05 molar equivalent of azobisisobutyronitrile, 0.1 Molar equivalent parts of tetramethylethylenediamine (TEMED), stirred and mixed evenly, heated to 80°C, reacted for 2h, then added 5wt% cellulose nanocrystals, reacted for 2h, and filtered under reduced pressure to obtain a solid polymer sample. Putting the polymer sample into the mold, heating and pressing, a polymer material with certain flexibility can be obtained. When the material is bent, the color at the bend becomes orange-red, and it has strong fluorescence under ultraviolet light. After bending to a certain extent, the bending stress of the polymer begins to rise. This is due to the reaction of the ring-opened sulfhydryl group and the ring-opened double bond to form a secondary crosslink, forming a force-induced enhancement, which can be used ...

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Abstract

The invention discloses a force-induced responsive cross-linked polymer, which contains at least two force-sensitive groups and has only one cross-linked network with the cross-linking degree being above a gel point. According to the cross-linked polymer, at least two force-sensitive groups contained in one cross-linked network are reasonably combined, so that a wide variety of force-induced responsiveness can be simply and efficiently obtained.

Description

technical field [0001] The invention relates to a cross-linked polymer, in particular to a mechanoresponsive polymer. Background technique [0002] Polymer materials are widely used materials today. With the development and progress of science and technology, after entering the 21st century, a large number of intelligent polymer materials with various properties have emerged, and traditional polymers are also used in their basic properties. On the basis of advanced technology, it continues to develop in the direction of functionalization, intelligence, and refinement. Polymer materials are also transformed from structural materials to materials with effects such as light, electricity, sound, magnetism, biomedicine, bionics, catalysis, material separation, and energy conversion. The direction of functional materials has expanded, and a series of new polymer materials with functional effects have emerged, such as separation materials, biomaterials, smart materials, energy stor...

Claims

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Application Information

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IPC IPC(8): C08J3/24
CPCC08J3/243
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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