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Hybrid crosslinked dynamic polymer

A hybrid cross-linking and polymer technology, applied in the field of smart polymers, can solve the problems of lack of dynamics, covalent interpenetrating network can not be repaired, performance and application limitations, etc., to achieve diverse performance, excellent cycle, high value effect

Active Publication Date: 2019-01-15
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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  • Hybrid crosslinked dynamic polymer
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preparation example Construction

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

[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 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 gel, shape and become a foam material. In order to shorten the molding cycle, air can be introduced and emulsifiers or surfactants can be added.

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

Embodiment 1

[0205] Dissolve pyridine-3,5-dicarboxylic acid in dichloromethane, then add a certain amount of thionyl chloride, and reflux reaction at 70°C, so that the two carboxylic acid chlorides of pyridine-3,5-dicarboxylic acid , and finally remove the generated impurities to obtain pyridine-3,5-diacyl chloride. Mix propane-1,2,3-triol with a certain amount of pyridine-3,5-dichloride, use triethylamine as a catalyst, react in dichloromethane, and control the number of moles of hydroxyl groups and moles of acid chloride groups in the reaction The ratio is about 3:2, and the polycondensation reaction is carried out to obtain a 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 parts of chain extender 2,2-bis(hydroxymethyl) propionic acid, 0.2 parts of dibutyltin dilaurate, 0.2 parts of triethylene bis Add amine and 0.1 part of silicone oil to No. 1 reactor, and sti...

Embodiment 2

[0207]

[0208] Add 100g of amino-terminated silicone oil and 200mL of dry dichloromethane to Reactor No. 1, and stir for 2 h at room temperature in a nitrogen atmosphere for later use; add 4.08 g of pyridinedicarboxylic acid chloride and 20 mL of dry dichloromethane Chloromethane, stirred at room temperature under nitrogen atmosphere for 2h for later use. Mix the solution in the No. 2 reactor with the solution in the No. 1 reactor in an ice bath at 0°C, stir for 2 hours, then move to room temperature, and continue to stir for 48 hours to obtain polymer 2. Add 5 parts of polymer 2, 6 parts of TDI in No. 3 reactors by weight, form prepolymer polymer 2 ' 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-propylenediamine, Add 0.1 part of silicone oil, 5 parts of dichloromethane, 3 parts of water, and 0.5 part of ferric chloride solution into t...

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Abstract

The invention discloses a hybrid crosslinked dynamic polymer, which contains metal-ligand interaction and covalent bond formed covalent crosslinking. Specifically, covalent crosslinking reaches the gel point of covalent crosslinking or above in at least one crosslinked network. The dynamic polymer combines the respective advantages of metal-ligand interaction and covalent crosslinking, and throughregulation of the reactant structure, polymer materials with abundant structures and diverse properties can be prepared. The dynamic reversibility of the metal-ligand interaction in the dynamic polymer enables the polymer to show stimulus response and other functional properties, and has self-repair, shape memory, toughening and other effects on the material in a specific structure. And covalentcrosslinking endows the polymer with certain strength and stability. The dynamic polymer can be widely applied as a self-repair material, ductile material, sealing material, shape memory material, force sensor material and the like.

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] Crosslinking is a general method for materials such as polymers to form a three-dimensional network structure to achieve effects such as elastomers, thermosetting plastics, and improvement of polymer thermal stability and mechanical properties. Crosslinking can be chemical (covalent) crosslinking or physical (non-covalent / supramolecular) crosslinking. Because chemical crosslinking is especially helpful to improve polymer thermal stability, mechanical properties, dimensional stability, etc., it occupies a large proportion in polymer crosslinking. However, when only chemical covalent crosslinking is used, 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 ...

Claims

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Application Information

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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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