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Energy-absorbing method based on hybrid dynamic polymer

A polymeric, dynamic technology for energy-absorbing applications

Inactive Publication Date: 2018-07-31
厦门逍扬运动科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These structures for energy absorption are often a simple superposition of the above-mentioned mechanisms. Compared with the single above-mentioned mechanism, although the energy-absorbing range has been expanded to a certain extent and the energy-absorbing efficiency has been improved, its shortcomings cannot be avoided.

Method used

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  • Energy-absorbing method based on hybrid dynamic polymer
  • Energy-absorbing method based on hybrid dynamic polymer
  • Energy-absorbing method based on hybrid dynamic polymer

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preparation example Construction

[0232] In the preparation process of hybrid dynamic polymers, after the compounds used as raw materials participate in the reaction with each other, the raw material components can be polymerized with boron-containing dynamic covalent bonds or ordinary covalent bonds as link points to obtain higher molecular weight Hybrid Dynamic Polymers. The composition selection and formula ratio of various raw materials used in the preparation of hybrid dynamic polymers can be flexibly controlled, but reasonable design and combination should be carried out according to the properties of the target material, the structure of the selected compound, the number of reactive groups contained, and the molecular weight . The various raw material components added should ensure that the molar equivalent ratio of the functional groups and / or other reactive groups in the reactant system is in an appropriate range. The functional groups contained in the raw material components can be fully reacted or ...

Embodiment 1

[0290] Dissolve 1 molar equivalent of polyethylene glycol (average molecular weight about 2000 Da) terminated by alkenyl groups at both ends and 2 molar equivalents of 3-mercapto-1,2-propanediol in dimethylformamide (DMF), at 0.1 molar equivalent In the presence of photocatalyst benzoin dimethyl ether (BDK), react at room temperature under ultraviolet light to obtain polyethylene glycol terminated with diol.

[0291] Under the protection of nitrogen, disperse 1 molar equivalent of 2-formylphenylboronic acid and anhydrous magnesium sulfate in anhydrous methanol, drop into a methanol solution containing 4 molar equivalents of ethylenediamine at 0 ° C, stir for 30 minutes, and then rise to Stirring was continued at room temperature for 3 hours. The temperature of the reaction solution was lowered to 0°C again, 3 molar equivalents of sodium borohydride was added, and then raised to room temperature to continue stirring for 1 hour. Concentrate the reaction solution, add deionized ...

Embodiment 2

[0295] 2 molar equivalents of compound 2-aminomethylphenylboronic acid and 1 molar equivalent of 1,6-hexamethylene diisocyanate were fully reacted in dichloromethane to obtain compound 2a.

[0296] Dissolve 3 molar equivalents of compound 2a and 2 molar equivalents of boric acid in toluene, slowly add tetrahydrofuran solvent containing 6 molar equivalents of tetraethylene glycol, and react under reflux with water separation to obtain the corresponding hybrid dynamic polymer.

[0297] The hybrid dynamic polymer has a "shear thickening" effect and can be used for shock absorption and shock resistance.

[0298]

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Abstract

The invention discloses an energy-absorbing method based on a hybrid dynamic polymer. The hybrid dynamic polymer contains both organic borate bonds and inorganic borate bonds and selectively containsone or more selected from a group consisting of boric anhydride dynamic covalent bonds and supramolecular hydrogen bonds. Due to dynamic reversibility of the boron-containing dynamic covalent bonds and the supramolecular hydrogen bonds, the hybrid dynamic polymer can provide the good functions of damping, shock absorption, sound insulation, impact resistance and the like as an energy-absorbing material; and the hybrid dynamic polymer is especially applicable to the body protection of people during exercises, daily life and working, the body protection of the military police, explosion prevention, protection in airborne landing and aerial delivery, collision prevention of automobiles, anti-impact protection of electronic products and electric appliances, etc.

Description

technical field [0001] The invention relates to an energy absorbing method, in particular to an energy absorbing method based on a hybrid dynamic polymer. Background technique [0002] In daily life, sports, entertainment, military, police, security, medical care, production and other activities, human bodies, animal bodies and objects are often severely affected by physical shocks such as impacts, vibrations, shocks, explosions, and sounds. By using energy-absorbing materials to absorb energy, it can effectively protect and alleviate such physical impacts. These energy absorption methods are divided into active energy absorption and passive energy absorption. Active energy absorption includes methods such as the use of shock absorbers, and passive energy absorption includes methods such as the use of materials with energy-absorbing functions. The materials used for energy absorption mainly include metals, polymers, composite materials and other materials. Among them, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G79/08C08L85/04
CPCC08G79/08C08L85/04
Inventor 不公告发明人
Owner 厦门逍扬运动科技有限公司
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