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A dynamic polymer with hybrid cross-linked network and its application

A hybrid cross-linking and cross-linking network technology, applied in the field of intelligent polymers, can solve the problems of limited dynamics and restrictions of dynamic covalent bonds, achieve excellent tensile toughness and tear resistance, and improve tolerance Effect

Active Publication Date: 2022-04-15
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

However, polymer systems cross-linked by dynamic covalent bonds are still relatively rare, and the dynamics of existing dynamic covalent bonds are very limited, often need to add catalysts or external energy (such as heating, light, etc.) to accelerate Equilibrium process, which makes it very limited in the construction of dynamically covalently cross-linked polymer materials

Method used

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  • A dynamic polymer with hybrid cross-linked network and its application
  • A dynamic polymer with hybrid cross-linked network and its application
  • A dynamic polymer with hybrid cross-linked network and its application

Examples

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Effect test

preparation example Construction

[0218] In the preparation process of dynamic polymers, for dynamic polymers with the first network structure (containing only one cross-linked network, and this cross-linked network contains organoboric acid silicon ester bond cross-links and supramolecular hydrogen bond cross-links) , which can be obtained by using at least one organoboron compound (I) and at least one silicon-containing compound (II) to participate in the reaction to generate organoborate silicon ester bonds and supramolecular hydrogen bonds for hybrid crosslinking; or use at least one compound ( III), or it participates in the reaction with at least one organoboron compound (I) and / or at least one silicon-containing compound (II) to generate organoboronic acid silicon ester bonds and supramolecular hydrogen bonds for hybrid crosslinking; or use at least one A compound (IV), or it participates in the reaction with at least one compound (V) to generate a common covalent bond to obtain hybrid crosslinking; wher...

Embodiment 1

[0314] A dynamic polymer with a single hybrid crosslinking network is prepared by using a macromolecular organoboron compound (I) and a small molecular silicon-containing compound (II).

[0315]

[0316] Add 20g of acrylamide-phenylboronic acid-urethane copolymer (a) in a three-necked flask (using methyl isocyanate and N-(2-hydroxyethyl) acrylamide as raw materials to prepare urethane mono Then use AIBN as an initiator to obtain acrylamide, 3-acrylamidophenylboronic acid, and carbamate monomers through RAFT free radical polymerization), 200ml deionized water / THF mixed solvent, heat to 50°C and stir After dissolving, slowly add 2.8g 1,1,3,3,5,5,7,7-octamethyl-1,7-tetrasiloxanediol (b), stir and mix for 30min, then add 2ml triethylamine , Continue to stir the reaction at 50°C for 2h. Then add 1.0g sodium dodecylbenzenesulfonate, 0.6g bentonite, 0.3g stearic acid, 0.3g oleic acid, then add 0.3g organic bentonite, 0.3g polydimethylsiloxane, 0.3g Dibutyltin dilaurate, 30mg lig...

Embodiment 2

[0318] A dynamic polymer with a single hybrid crosslinking network is prepared by using a macromolecular silicon-containing compound (II) and a small molecular organoboron compound (I).

[0319]

[0320]Take 7.5g of boric acid compound (b) (prepared by reacting 2-aminomethylphenylboronic acid and 1,6-hexamethylene diisocyanate) into a dry and clean reaction bottle, add 200ml of THF solvent, and heat to 60°C for Stir and dissolve, then add dropwise a small amount of 20% aqueous acetic acid solution, slowly add 30g of silane-modified polypropylene oxide copolymer (a) (with propylene glycol, propylene oxide, N-(2-ethylene oxide) under stirring base methyl) carbamate as raw material, and boron trifluoride ether as a catalyst, through cationic ring-opening polymerization to synthesize a propylene oxide copolymer with a carbamate group in the side group; -diphenylmethane diisocyanate, 3-aminopropyltrimethoxysilane reaction to obtain the final product) after stirring and mixing fo...

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Abstract

The invention discloses a dynamic polymer with a hybrid cross-linking network, which includes dynamic covalent cross-linking and supramolecular hydrogen bond cross-linking; wherein, the dynamic covalent cross-linking is realized by organic silicon borate bonds , the dynamic covalent crosslinking reaches above the gel point in at least one crosslinking network; the supramolecular hydrogen bond crosslinking is formed by side groups and / or side hydrogen bond groups on side chains. This kind of dynamic polymer combines dynamic covalent organic boronate silicon ester bonds with supramolecular hydrogen bonds. By adjusting the structure of reactants, dynamic polymers with rich structures and diverse properties can be prepared. The dynamic polymer can be used to make shock-absorbing and buffering materials, impact-resistant protective materials, self-repairing materials, tough materials, and the like.

Description

technical field [0001] The invention relates to the field of intelligent polymers, in particular to a dynamic polymer with a hybrid crosslinking network composed of dynamic covalent bonds and supramolecular hydrogen bonds. Background technique [0002] After entering the 21st century, the progress of science and technology and the development of the economy have put forward higher requirements for polymers and their materials. On the basis of basic performance, polymers are also constantly developing in the direction of functionalization, intelligence and refinement. , polymer materials are also expanding from structural materials to functional materials with effects such as light, electricity, sound, magnetism, biomedicine, bionics, catalysis, material separation, and energy conversion. Materials, energy storage materials, photoconductive materials, nanomaterials, electronic information materials and other new polymer materials with functional effects. The research on the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G79/08C08G18/48C08G18/38C08G18/34C08G18/76C08G18/66C08G18/61C08L85/04C08L75/04C08L75/08C09J185/04C09J175/04C09J175/08
CPCC09J175/04C09J175/08C09J185/04C08G18/348C08G18/3857C08G18/3893C08G18/4833C08G18/61C08G18/6692C08G18/6696C08G18/7614C08G79/08C08L75/04C08L75/08C08L85/04
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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