Force-induced responsive cross-linked polymer

A technology of cross-linked polymers and polymers, applied in the field of mechanoresponsive polymers, can solve problems that cannot meet the needs of human social 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

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Problems solved by technology

Although material technology has developed rapidly in recent decades

Method used

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

Examples

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Effect test

preparation example Construction

[1798] In the preparation process of the polymer, three methods of mechanical foaming, physical foaming and chemical foaming are mainly used to foam it.

[1799] 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.

[1800] 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

[1812]

[1813] With 0.3 molar equivalents of compound (a), 0.3 molar equivalents of pentaerythritol, and 2 molar equivalents of carboxy-terminated polytetrahydrofuran with a molecular weight of 5000, dichloromethane was used as a solvent, and 0.01 molar equivalents of N,N-diisopropylcarbodiethylene Amine, 0.01 molar equivalent of diphenyl-4-phenylthiophenylsulfonium salt, make the reaction system stir and react at room temperature for 24h, remove the solvent, pour the reactant into a specific mold, and prepare a polymer film. In this example, under the action of tensile force, the prepared polymer film changed from non-fluorescence to blue fluorescence under ultraviolet light. Taking advantage of this property, it can be used as a stress warning material .

Embodiment 2

[1815]

[1816] Weigh 0.3 molar equivalent of compound (a), 0.1 molar equivalent of aluminum-containing catalyst compound (c) and 1 molar equivalent of racemic lactide into a reactor, use toluene as solvent, and heat to 70°C under nitrogen atmosphere , stirred for 4 h, then cooled in ice water for 10 min, then cooled in ice for 10 min, then added 0.3 molar equivalent of glycerol, and heated at 70 ° C for 120 h, the resulting polymer was precipitated in cold petroleum ether, and The filtered product was swelled in ethanol solvent for 24 h to prepare a polymer organogel. Under the action of stress, the force-sensitive groups of the polymer will open rings, which improves the toughness of the organic gel, and the gel will self-degrade under certain conditions, and can be used as a drug wrapping material.

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Abstract

The invention discloses a force-induced responsive cross-linked polymer. The force-induced responsive cross-linked polymer contains a force-sensitive group and only contains one cross-linked network,wherein the cross-linked network contains common covalent cross-linking and force-sensitive group cross-linking at the same time, the cross-linking degree of the common covalent cross-linking is abovethe gel point of the cross-linked network, and the cross-linking degree of the force-sensitive group cross-linking is above or below the gel point of the cross-linked network; and the force-sensitivegroup can be subjected to chemical and/or physical changes under the action of mechanical force, so that the polymer realizes force-induced response. The polymer can be widely applied as a stress sensing material, an ion detection material, a sensor material, a bioanalysis material and the like.

Description

technical field [0001] The invention relates to a mechanoresponsive polymer, in particular to a mechanoresponsive cross-linked polymer containing a mesosensitive group. Background technique [0002] The progress of material science and technology has greatly promoted the development and changes of human society. Although material technology has developed rapidly in recent decades, it still cannot meet the needs of the development of human society. Therefore, people are constantly pursuing the creation of new materials with novel structures and excellent properties. Polymer materials are an important branch of materials, which play a very important role in human life and industrial production. In the use of polymers, polymers are often subjected to mechanical forces. Therefore, the construction of polymers with sensitive responses to mechanical forces has multiple meanings in theory and reality. Contents of the invention [0003] Aiming at the above background, a mechan...

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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