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Dynamic polymer and application thereof

A polymer, dynamic technology, applied in the field of intelligent polymer materials, can solve the problems of difficult to fully reflect dynamic covalent bonds, difficult characteristics, difficult controllability, etc.

Pending Publication Date: 2018-07-31
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, some common dynamic covalent bonds require relatively high conditions for dynamic reversible reactions, and it is difficult to achieve good controllability. For example, trithioester bonds must undergo dynamic reactions under ultraviolet light, and olefin metathesis reactions require efficient catalysts. Catalytic dynamic reaction, acylhydrazone bond must have dynamic reaction under PH ≤ 4 or high temperature catalysis, etc. These conditions make dynamic polymers very limited in daily application, and it is difficult to effectively exert their characteristics
The existence of such situations makes it difficult to fully reflect the characteristics of the dynamic covalent bond itself under normal conditions. It is necessary to develop a dynamic polymer in which the dynamic covalent bond in the system can satisfy both mild reaction conditions and reversible reactions. Controllable conditions to solve the above-mentioned problems existing in the prior art

Method used

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Experimental program
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Embodiment approach

[0086] According to an embodiment of the present invention, the organoboroxine-boron bond has the following structure:

[0087]

[0088] Wherein, each boron atom in the structure is connected to at least one carbon atom through a boron-carbon bond, and at least one organic group is connected to a boron atom through the boron-carbon bond; each boron atom in the structure can form One or two organoboroxine bonds, different organoboroxine bonds can be connected to form a ring or not connected to form a ring; Indicates a connection to any suitable atom, group, substituent, polymer chain, at least two different boron atoms via at least one on each Incorporated into the polymer chain; different on the same boron atom It can be connected to form a ring or not to form a ring, and the boron atoms on different boron atoms The rings may also be connected to form a ring or not connected to form a ring, and the rings include but not limited to aliphatic rings, aromatic rings, ethe...

Embodiment 1

[0228] Starting from ethylene, 4-vinylphenylboronic acid, and neopentyl glycol 4-vinylphenylboronic acid, the reaction was carried out in a flask connected to a mineral oil bubbler. A mixed gas of nitrogen and ethylene was introduced to keep the pressure of ethylene in the reaction system at 0.1 atm. Add 4-vinylphenylboronic acid (0.05M) in chlorobenzene / toluene solution, 4-vinylphenylboronic acid neopentyl glycol ester (0.04M) in chlorobenzene / toluene solution, Pd-α-diimine catalyst chlorine Benzene / toluene solution was stirred at room temperature for 26 h, and then excess triethylsilane was added under nitrogen atmosphere to terminate the polymerization reaction. Separation, concentration, and drying are carried out at last to obtain pure dendritic polyethylene containing polyphenylboronic acid (ester) end groups (101 branches per 1000CH 2 , molecular weight reaches 45000), wherein the total insertion rate of 4-vinylphenylboronic acid and 4-vinylphenylboronic acid ester is ...

Embodiment 2

[0232] Using equimolar amounts of 1-amino-5-hexene and propyl isocyanate as raw materials, react at room temperature under a nitrogen atmosphere to prepare ureido-containing olefins. Add 85ml of toluene, 0.8ml of ureido-containing olefin, 1.8ml of but-3-ene ethylene glycol borate, and 10ml of MAO to the reaction flask rinsed with the toluene solution of triisobutylaluminum. After the reaction system is thermally balanced, add ethylene until The ethylene pressure in the system is 2 bar. Then add 2ml rac-Me 2 Si(2-MeBenz[e]Ind) 2 ZrCl 2 (1μmol) toluene solution, the polymerization starts, and the ethylene pressure is kept constant during the reaction. After reacting for 10 min, methanol was added to terminate the reaction. Subsequently, methanol precipitation, hydrochloric acid aqueous solution treatment, filtration, deionized water treatment, and vacuum drying at 70° C. obtained a propylene copolymer containing boric acid and ureido side groups.

[0233] Take 35g of propyl...

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Abstract

The invention discloses a dynamic polymer. The structure of the dynamic polymer contains dynamic covalent bonds and optional hydrogen bonds, wherein the dynamic covalent bonds are organic boron-oxygen-boron bonds; the structure of the dynamic polymer contains at least three organic boron-oxygen-boron bonds which realize connection without shared boron atoms; and the dynamic polymer has at least one glass-transition temperature no more than 25 DEG C. The dynamic covalent bonds and the optional hydrogen bonds have dynamic reversibility, so the dynamic polymer is endowed with good toughness, self-repairing performance, buffering performance and the like. The dynamic polymer is rich in structure and diversified in performance, has good regulability and can be applied to fields like buffer products, damping products, protection materials, sport protection materials, self-repairing materials, stress sensors, tough materials, adhesives and sealing materials.

Description

technical field [0001] The invention relates to the category of intelligent polymer materials, in particular to a dynamic polymer containing organic boron oxygen boron dynamic covalent bonds. Background technique [0002] With the rapid development of supramolecular phenomena and self-assembly processes, the field of dynamic covalent chemistry is experiencing a renaissance. Supramolecular chemistry is a discipline involving non-covalent interactions, a process controlled by thermodynamics. However, these supramolecular structures are unstable, especially in solution, which are often difficult to characterize and conduct in-depth studies. Therefore, it is very attractive to construct a reversible and relatively stable molecular structure. [0003] For dynamic covalent chemistry, it has the characteristics similar to supramolecular chemistry. Under suitable conditions, reversible covalent bond "breaking" and "reconstruction" can occur; compared with supramolecular chemistry,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C08K3/34C08K5/544C08F210/02C08F230/06C08F226/02C08L23/08C08K3/22C08K5/134C08J9/10C08C19/20
CPCC08C19/20C08F210/02C08G83/003C08G83/004C08J9/103C08K3/22C08K3/346C08K5/1345C08K5/544C08L23/08C08J2203/04C08J2323/08C08K2003/2296C08L2203/14C08F230/06C08F226/02C08L23/0892
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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