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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 and restricted dynamic covalent bonds, achieve high dynamic reversibility and stress sensitivity, excellent tensile toughness and resistance tearing effect

Active Publication Date: 2022-04-01
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

At present, 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 provide energy (such as heating, light, etc.) 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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preparation example Construction

[0210] In the preparation process of the dynamic polymer, for the dynamic polymer with the first kind of network structure (containing only one cross-linked network, and this cross-linked network contains both common covalent cross-links and organoboric acid silicon ester bond cross-links), It 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 form organoborate silicon ester bonds and ordinary covalent bonds for hybrid crosslinking; or by using 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 organoborate silicon ester bonds and ordinary covalent bonds for hybrid crosslinking; or utilize at least one A compound (IV), or it participates in the reaction with at least one compound (V) to form a common covalent bond for hybrid crosslinking; wherein, at least one org...

Embodiment 1

[0317] A dynamic polymer with a double cross-linked network is prepared by using a macromolecular organoboron compound (I), a small molecular silicon-containing compound (II), a macromolecular compound (V), and a small molecular compound (V), wherein the first network is a dynamic copolymer. Valence cross-linking, the second network is common covalent cross-linking.

[0318]

[0319] Add 15g acrylamide-phenylboronic acid copolymer (a) (with AIBN as initiator, acrylamide, 3-acrylamidophenylboronic acid as raw material, obtained by RAFT free radical polymerization) in the three-necked flask, 200ml deionized water, heating After stirring and dissolving at 50°C, add a little acetic acid dropwise, and slowly add 1.7g of silane compound (b) (made by reacting 3-aminopropylmethyldimethoxysilane and adipoyl chloride as raw materials), stir and mix After 30 min, 2 ml of triethylamine was added, and the stirring reaction was continued at 50° C. for 2 h to form the first network. Then...

Embodiment 2

[0321] A dynamic polymer with a double cross-linked network is prepared by using a small molecular compound (V), a macromolecular compound (V), a macromolecular organoboron compound (I), and a small molecular silicon-containing compound (II), wherein the first network is a common copolymer. valence crosslinks, and the second network is dynamic covalent crosslinks.

[0322]

[0323] Add 100ml of tetrahydrofuran solvent in a dry and clean reaction flask, after sealing, utilize argon gas bubbling to remove oxygen for 1h, then add 0.6g azide compound (a) (using pentaerythritol and 3-bromopropionic acid as raw materials) in the reaction flask , after pentaerythritol 3-bromopropionate is obtained by esterification, it is prepared by reacting it with sodium azide), 4.32g of alkyne-terminated polyamide (b) (polyamide with a molecular weight of about 5000, 5- Alkynyl hexanoic acid and propargyl alcohol as raw materials, dicyclohexylcarbodiimide and 4-dimethylaminopyridine as catalys...

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Abstract

The invention discloses a dynamic polymer with a hybrid cross-linking network, which includes ordinary covalent cross-linking and dynamic covalent cross-linking, wherein the dynamic covalent cross-linking is realized by organic borate silicon ester bonds. This kind of dynamic polymer combines the advantages of dynamic covalent organo-silicon borate bond and ordinary covalent bond, and through the regulation of the structure of reactants, polymers with rich structures and various properties can be prepared. The strong dynamic reversibility of dynamic covalent crosslinking in dynamic polymers enables polymers to exhibit functional properties such as stimuli responsiveness and self-healing properties, while ordinary covalent crosslinking endows polymers with a certain strength and Stability; in addition, the dynamic nature of organoborosilicate bonds can produce good energy dissipation and energy absorption effects, and toughen, damp and impact-resistant materials in specific structures. 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 ordinary covalent bonds. Background technique [0002] After entering the 21st century, the advancement 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 rel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/24C08L33/26C08L33/02C08K13/04C08K7/28C08K5/09C08L77/00C08L71/02C08G77/46C08L83/12C08L83/06C08K5/55C08L83/07C08L83/05C08K3/08C08K3/30
CPCC08G77/46C08J3/246C08L33/26C08L77/00C08L83/06C08L83/12C08J2383/12C08J2383/06C08J2377/00C08J2333/26C08L2312/00C08J2433/02C08J2483/04C08J2483/06C08J2471/02C08L2205/02C08L33/02C08K13/04C08K7/28C08K5/09C08L71/02C08K5/55C08L83/04C08K2003/3045C08K2003/0881C08G77/56C08J3/24
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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