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Dynamic polymer having hybrid cross-linked network and application thereof

A technology of hybrid cross-linking and cross-linking network, applied in the field of smart polymers, which can solve the problems of limitation and limited dynamics of dynamic covalent bonds.

Active Publication Date: 2018-03-16
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 crosslinked polymer materials

Method used

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  • Dynamic polymer having hybrid cross-linked network and application thereof
  • Dynamic polymer having hybrid cross-linked network and application thereof
  • Dynamic polymer having hybrid cross-linked network and application thereof

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 organic borate silicon ester bonds and ordinary covalent 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 form a common covalent bond for hybrid crosslinking; wherein, at least one organo...

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, obtain by RAFT free radical polymerization) in the three-necked flask, 200ml deionized water, heat 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 add 1...

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, seal it, use argon gas bubbles 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 catalysts, prepare...

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Abstract

The invention discloses a dynamic polymer having a hybrid cross-linked network, and contains common covalent crosslinking and dynamic covalent crosslinking; and the dynamic covalent crosslinking is realized by organic boric acid silicon ester bonds. The dynamic polymer combines the advantages of dynamic covalent organic boric acid silicon ester bonds and a common covalent bond, and by regulation and control of a reactant structure, a dynamic polymer having abundant structure and various properties can be prepared. The dynamic covalent crosslinking in the dynamic polymer has strong dynamic reversibility, the polymer can present function characteristics of stimulation responsiveness and self-repair performance, and the common covalent crosslinking endows certain intensity and stability to the polymer; in addition, the dynamic nature of the organic organic boric acid silicon ester bonds can generate good energy dissipation and energy-absorbing effect, and is capable of toughening, dampingand resisting impact on a material in a specific structure. The dynamic polymer can be used for preparing a shock-absorption material, a shock-resistant protection material, a self-repair material, and a toughness material.

Description

technical field [0001] The invention relates to the field of intelligent polymers, in particular to a dynamic polymer composed of dynamic covalent bonds and ordinary covalent bonds and having a hybrid cross-linked network. 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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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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