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Hybrid dynamic polymer

A technology of hybridization and polymers, applied in the field of intelligent polymers, can solve problems such as weak dynamics and difficult practical applications

Pending Publication Date: 2020-07-07
厦门逍扬运动科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because it is a covalent bond, its dynamics are generally relatively weak, and it needs to be realized under harsh conditions to achieve recycling, recyclability, self-repair and other intelligence, which brings great difficulties to practical applications.

Method used

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Examples

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preparation example Construction

[0176] In the preparation process of dynamic polymer foam materials, three methods of mechanical foaming, physical foaming and chemical foaming are mainly used to foam dynamic polymers.

[0177] 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 dynamic polymer to make it a uniform foam, and then through physical Or chemical changes make it shape and become a foam material. In order to shorten the molding cycle, air can be introduced and emulsifiers or surfactants can be added.

[0178] Wherein, the physical foaming method is to use physical principles to realize the foaming of the polymer during the preparation of the dynamic polymer, which includes but not limited to the following methods: (1) inert gas foaming method, that is, after adding Press the inert gas into the molten polymer or pasty material under press...

Embodiment 1

[0244] Under the protection of nitrogen, 1 mass part of selenium powder was added to 50 mass parts of aqueous solution dissolved with 1 mass part of sodium borohydride, stirred for 10 min under magnetic stirring, then 1 mass part of selenium powder was added, and after continuing to stir for 15 min, slowly Raise the temperature until the selenium powder is completely dissolved to obtain a brown-red aqueous solution of sodium selenide; the aqueous solution of sodium selenide is transferred to a single-necked flask and sealed with a rubber stopper; A part of tetrahydrofuran solution was injected into a sealed single-necked flask under nitrogen protection, reacted at 50°C for 6h, then extracted three times with dichloromethane, and dried with anhydrous sodium sulfate to obtain a yellow transparent liquid bis-hydroxyethyl diselenide; 4.2 parts by mass of 1,6-hexamethylene diisocyanate and 0.01 molar equivalent of triethylamine were added to reactor No. 1, and after the temperature ...

Embodiment 2

[0246] Under the protection of nitrogen, 1 mass part of selenium powder was added to 50 mass parts of aqueous solution dissolved with 1 mass part of sodium borohydride, stirred for 10 min under magnetic stirring, then 1 mass part of selenium powder was added, and after continuing to stir for 15 min, slowly Raise the temperature until the selenium powder is completely dissolved to obtain a brownish-red aqueous solution of sodium selenide; the aqueous solution of sodium selenide is transferred to a single-necked flask and sealed with a rubber stopper; Parts by mass of THF solution were injected into a sealed single-necked flask under nitrogen protection, reacted at 50°C for 6h, then extracted three times with dichloromethane, and dried with anhydrous sodium sulfate to obtain diamine ethyl diselenide; in No. 1 In the reactor, get 1 molar equivalent of sodium alginate and dissolve it in a sufficient amount of deionized water, then add 0.5 molar equivalent of NaIO 4 , after stirrin...

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Abstract

The invention discloses a hybrid dynamic polymer. The hybrid dynamic polymer is characterized by containing a hydrogen-bond interaction formed by participation of a dynamic diselenide bond and a sidehydrogen-bond group, wherein the dynamic diselenide bond exists as a polymerization link point and / or a cross-linking link point of the dynamic polymer, and is a necessary condition for forming or maintaining a covalent structure of the dynamic polymer. The dynamic polymer disclosed by the invention combines the advantages of dynamic covalent bonds and supramolecular action, so that the polymer has the characteristics of self-repairability, recoverability, repeatable processability and the like. Meanwhile, due to the existence of the supramolecular hydrogen bonds, the supramolecular hydrogen bonds can be broken preferentially as sacrificial bonds, so that the material shows good toughness. The dynamic polymer can be widely applied as a self-repairing material, a tough material, a sealing material and the like.

Description

technical field [0001] The invention relates to the field of intelligent polymers, in particular to a hybrid dynamic polymer composed of dynamic double selenium bonds and supramolecular hydrogen bonds. Background technique [0002] Since the birth of polymer materials, they have brought great progress to human beings and also brought problems such as environmental pollution and waste of resources. Green and sustainable materials are an important direction for the development of polymer materials. With the depletion of fossil energy, the development of intelligent polymer materials that can prolong the service life of materials and recycle them will become the next trend. [0003] Due to its good dynamic reversibility, supramolecular hydrogen bond can repair itself when the material is damaged, such as cracks, and can also be stimulated by some means such as heating to achieve self-repair; at the same time, since supramolecular hydrogen bond is a non- The covalent interactio...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/32C08K3/04C08G101/00
CPCC08G18/6666C08G18/48C08G18/3897C08K3/041C08K3/042C08G2101/00
Inventor 不公告发明人
Owner 厦门逍扬运动科技有限公司
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