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A hybrid cross-linked dynamic polymer

A hybrid cross-linking, polymer technology, applied in the field of smart polymers, can solve the problems of performance and application limitations, covalent interpenetrating network cannot be repaired, lack of dynamics, etc. various effects

Active Publication Date: 2022-08-02
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

This kind of covalent interpenetrating network not only cannot be repaired after damage, but also lacks dynamics, which greatly limits its performance and application.

Method used

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  • A hybrid cross-linked dynamic polymer
  • A hybrid cross-linked dynamic polymer
  • A hybrid cross-linked dynamic polymer

Examples

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preparation example Construction

[0145] In the preparation process of dynamic polymer, three methods are mainly used to foam dynamic polymer: mechanical foaming method, physical foaming method and chemical foaming method.

[0146] 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 by vigorous stirring in the preparation process of the dynamic polymer to make it into a uniform foam, and then through physical Or chemical changes make it gel and form into foam. In order to shorten the molding cycle, air can be introduced and emulsifiers or surfactants can be added.

[0147]Wherein, the described physical foaming method utilizes physical principles to realize the foaming of the polymer in the preparation process of the dynamic polymer, which generally includes but is not limited to the following methods: (1) the inert gas foaming method, that is, in the Press the inert gas into the molten polymer or paste materia...

Embodiment 1

[0205] Pyridine-3,5-dicarboxylic acid was dissolved in dichloromethane, and then a certain amount of thionyl chloride was added, and the reaction was refluxed at 70 °C, so that the two carboxylic acid chlorides of pyridine-3,5-dicarboxylic acid were dissolved. and finally remove the resulting impurities to obtain pyridine-3,5-diacid chloride. Mix propane-1,2,3-triol and a certain amount of pyridine-3,5-diacyl chloride, use triethylamine as a catalyst, and react in dichloromethane to control the number of moles of hydroxyl groups and the number of moles of acid chloride groups in the reaction The ratio is about 3:2, and the polycondensation reaction is carried out to obtain polymer 1 with a pyridine group in the backbone and a hydroxyl group in the side group. Weigh the reaction material component A in parts by weight: 10 parts of polymer 1, 0.2 part of chain extender 2,2-bis(hydroxymethyl)propionic acid, 0.2 part of dibutyltin dilaurate, 0.2 part of triethylenedicarbonate Ami...

Embodiment 2

[0207]

[0208] 100 g of amino-terminated silicone oil and 200 mL of dry dichloromethane were added to reactor No. 1, and stirred for 2 h at room temperature under nitrogen atmosphere; 4.08 g of pyridine dicarbonyl chloride and 20 mL of dry dichloromethane were added to No. Chloromethane was stirred at room temperature under nitrogen atmosphere for 2 h for use. The solution in Reactor No. 2 was mixed with the solution in Reactor No. 1 under an ice bath at 0°C, stirred for 2 h, moved to room temperature, and stirred for 48 h to obtain polymer 2. 5 parts of polymer 2 and 6 parts of TDI were added to the No. 3 reactor according to parts by weight, and the prepolymer polymer 2' was formed after high-speed stirring. Weigh the reaction material component A in parts by weight: 7 parts of polymer 2', 0.1 part of dibutyltin dilaurate, 0.1 part of 2-(aminomethyl)-2-methyl-1,3-propanediamine, 0.1 part of silicone oil, 5 parts of dichloromethane, 3 parts of water, and 0.5 part of ferr...

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Abstract

The invention discloses a hybrid cross-linked dynamic polymer, which contains metal-ligand action and covalent cross-linking formed by covalent bonds, wherein the covalent cross-linking achieves covalent cross-linking in at least one cross-linking network Linked above the gel point. Such dynamic polymers combine the respective advantages of metal-ligand interaction and covalent cross-linking, and through the regulation of reactant structures, polymer materials with rich structures and diverse properties can be prepared. The dynamic reversibility of metal-ligand interactions in dynamic polymers enables polymers to exhibit functional properties such as stimuli responsiveness, and can play a role in self-healing, shape memory, and toughening of materials in specific structures; while covalent Crosslinking in turn imparts a certain strength and stability to the polymer. The dynamic polymer can be widely used as self-healing material, tough material, sealing material, shape memory material, force sensor material and so on.

Description

Technical field: [0001] The invention relates to the field of intelligent polymers, in particular to a hybrid cross-linked dynamic polymer composed of covalent bonds and metal-ligand interactions. Background technique: [0002] Cross-linking is a general method for polymers and other materials to form a three-dimensional network structure to achieve the effects of obtaining elastomers, thermosetting plastics, and improving the thermal stability and mechanical properties of polymers. Cross-linking can be chemical (covalent) cross-linking or physical (non-covalent / supramolecular) cross-linking. Chemical cross-linking occupies a large proportion in the cross-linking of polymers because it is particularly helpful to improve the thermal stability, mechanical properties, and dimensional stability of polymers. However, when only chemical covalent crosslinking is used, it is difficult to reflect the responsiveness and dynamics to the outside world, and it is difficult to meet the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/46C08G18/34C08G18/65C08G18/61C08G18/32C08G18/60C08J9/08C08G101/00
CPCA61K47/34C08G18/3206C08G18/3228C08G18/348C08G18/3844C08G18/4646C08G18/603C08G18/61C08G18/615C08G18/6511C08G18/6529C08G18/6659C08G2110/0083
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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