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Dynamic polymer and application thereof

A polymer and dynamic technology, applied in the field of intelligent polymer materials, can solve problems such as difficult characteristics, single and limited dynamics

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

[0004] However, the dynamic polymers involved in utilizing numerous dynamic covalent bonds (such as imine bonds, acylhydrazone bonds, Diels-Alder reactions, tetramethylpiperidine nitroxide free radical reactions, etc.) limited, making it difficult to fully exploit the dynamics
In addition, some common dynamic covalent bonds require relatively high conditions for dynamic reversible reactions. For example, trithioester bonds must undergo dynamic reactions under ultraviolet light, olefin metathesis reactions require efficient catalysts to catalyze dynamic reactions, and acylhydrazone bonds must Dynamic reactions occur under PH ≤ 4 or high temperature catalysis, etc. These conditions make dynamic polymers very limited in daily applications, and it is difficult to effectively exert their characteristics

Method used

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  • Dynamic polymer and application thereof
  • Dynamic polymer and application thereof

Examples

Experimental program
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Embodiment 1

[0278] Using ethylene and 3-vinylbenzeneboronic acid as raw materials, the reaction is carried out in a flask connected with a mineral oil bubbler. A mixed gas of nitrogen and ethylene was introduced to keep the ethylene pressure in the reaction system at 34 atm. Add 3-vinylbenzeneboronic acid (0.9M) in chlorobenzene / toluene solution, then add Pd-α-diimine catalyst in chlorobenzene / toluene solution, stir at room temperature for 24h, and finally add excess under nitrogen atmosphere Triethylsilane terminates the polymerization reaction. Subsequent dilution, separation and concentration, and finally vacuum drying to obtain pure multi-branched linear polyethylene containing polyphenylboronic acid end groups. The total insertion rate of 3-vinylphenylboronic acid (ester) is 4.6%, with 97 branches per 1000CH 2 , The molecular weight reaches 77000).

[0279] Take 45g of multi-branched linear polyethylene containing polyphenylboronic acid end groups, 3.2g boric acid and an appropriate am...

Embodiment 2

[0282] Taking equimolar amounts of 1-amino-10-undecene and propyl isocyanate as raw materials, reacting at room temperature under nitrogen atmosphere to prepare ureido-containing olefins. Toluene as solvent, rac-Me 2 Si(2-MeBenz[e]Ind) 2 ZrCl 2 / MAO is a catalytic system that uses ethylene, ureido-containing olefins, but-3-ene boronic acid pinacol ester to polymerize. After the reaction is completed, it undergoes methanol precipitation, hydrochloric acid aqueous solution treatment, filtration, deionized water treatment, and vacuum drying at 70°C Then, an ethylene copolymer containing boric acid and urea group side groups is obtained.

[0283] Take 40g of ethylene copolymer containing boric acid and urea group side groups, 9g of diboric acid, 0.2g of antioxidant BHT and an appropriate amount of anhydrous MgSO 4 It was added to a dry and clean reactor, heated to 180°C under a nitrogen atmosphere, and melted and stirred for 1 h. Then add 1.0 g of plasticizer DOP and 0.25 g of dimeth...

Embodiment 3

[0286] Add 4-bromomethyl phenylborate sodium and styrene into the dimethylformamide solvent, in CuBr / Me 6 TREN catalyzed and ATRP reaction (polymerization) at 110°C to obtain polystyrene modified with sodium phenylborate single end group, in which sodium 4-bromomethylphenylborate:styrene:CuBr:Me 6 The molar ratio of TREN is 1:50:1:1. The obtained phenylborate single-end modified polystyrene was added to the dimethylformamide solvent, in CuBr / Me 6 TREN / nano Cu powder catalyzed and ATRC reaction (coupling) at 90℃ to obtain sodium phenylborate double-end modified polystyrene, wherein sodium phenylborate single-end modified polystyrene: CuBr:Me 6 The molar ratio of TREN:nano Cupowder is 1:2:10:5.

[0287] Dissolve 35 g of sodium phenylborate modified polystyrene in a chloroform solvent, add 2 ml of deionized water dropwise, and stir to hydrolyze. Dissolve 4 g of sodium borate in a chloroform solvent, add 1 ml of deionized water dropwise, stir and hydrolyze, and then control the temper...

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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 boron-oxygen-boron bonds which are composed of organic boron-oxygen-boron bonds, organic-inorganic boron-oxygen-boron bonds and inorganic boron-oxygen-boron bonds, or composed of organic boron-oxygen-boron bonds and organic-inorganic boron-oxygen-boron bonds, or composed of inorganic boron-oxygen-boron bonds and organic-inorganic boron-oxygen-boron bonds, or composed of organic-inorganic boron-oxygen-boron bonds; andall the inorganic boron-oxygen-boron bonds in the structure of the dynamic polymer are connected to the polymer via the organic-inorganic boron-oxygen-boron bonds and / or inorganic boron-oxygen-boronbonds. A plurality of the boron-oxygen-boron bonds and the optional hydrogen bonds in the structure of the dynamic polymer endow the dynamic polymer with good and hierarchical dynamic nature and allowthe dynamic polymer to have good toughness, buffering performance and self-repairing performance; and the dynamic polymer can be applied to fields like damping and buffering products, protection materials, sport protection materials, self-repairing materials, tough materials, stress-sensing materials, adhesives and sealing members.

Description

Technical field [0001] The present invention relates to the category of intelligent polymer materials, in particular to a dynamic polymer containing boron-oxyboron dynamic covalent bonds. Background technique [0002] At present, polymer materials have become important materials in the fields of industry, agriculture, national defense, science and technology, and occupy a very important position in contemporary and future international competition. Increasing developments in science and technology have higher and higher requirements for polymer materials. In addition to improving the basic performance of polymer materials, it also needs to continue to develop in the direction of functionalization (such as self-repair, etc.) and intelligence (such as responsiveness, etc.) . [0003] In this context, dynamic covalent chemistry, as one of dynamic chemistry, has gradually become dominant in materials science applications. Dynamic covalent chemistry mainly involves the use of dynamic ...

Claims

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Application Information

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IPC IPC(8): C08G79/08C08L85/04
CPCC08G79/08C08L85/04
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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