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Energy absorbing method based on hybrid dynamic polymer

A technology of polymers, polymer chains, applied in the field of energy absorption

Inactive Publication Date: 2019-04-23
厦门逍扬运动科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 is expanded to a certain extent and the energy-absorbing efficiency is 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

Examples

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preparation example Construction

[0274] In the preparation process of dynamic polymers, three methods of mechanical foaming, physical foaming and chemical foaming are mainly used to foam dynamic polymers.

[0275] Among them, the mechanical foaming method is to introduce a large amount of air or other gases into the emulsion, suspension or solution of the polymer with the help of strong stirring during the preparation of the dynamic polymer to make it a uniform foam, and then through physical Or chemical changes make it shape and become a foam material. In order to shorten the molding cycle, air can be introduced and emulsifiers or surfactants can be added.

[0276] Wherein, the physical foaming method is to use physical principles to realize the foaming of the polymer during the preparation of the dynamic polymer, which includes but not limited to the following methods: (1) inert gas foaming method, that is, after adding Press the inert gas into the molten polymer or pasty material under pressure, and then ...

Embodiment 1

[0296] Dissolve equimolar equivalents of 2-hydroxyethyl acrylate and 2-mercaptoethanol in THF, add 3 mol% of hexylamine catalyst relative to the molar equivalent of mercapto, and obtain a compound containing mercapto-Michael addition through mercapto-Michael addition reaction of diols. Add 90ml of anhydrous tetrahydrofuran solvent into a dry and clean reaction flask, then add 8.00g of polyetheramine, 8.28g of diols containing mercapto-Michael addition bonds, 12.33g of dicyclohexylmethane diisocyanate, 1.68g of 1-ethyl - 3-(6-isocyanohexyl)urea (prepared by reacting ethylamine with excess 1,6-hexamethylene diisocyanate) and 0.24g stannous octoate were refluxed for 8 hours to obtain the dynamic polymer of the present invention. The apparent viscosity of the dynamic polymer is tested using a rotational viscometer, wherein the test temperature is 25°C and the shear rate is constant at 0.1s -1 , The apparent viscosity of the dynamic polymer was measured to be 17400mPa·s. The resu...

Embodiment 2

[0298] With THF as solvent and hexylamine as catalyst, equimolar equivalent hydroxyacrylate and 2-mercaptoethanol are prepared through mercapto-Michael addition reaction to obtain glycols containing mercapto-Michael addition bonds; An aqueous solution is used as a solvent, and tetrabutylammonium bisulfate is used as a catalyst, and epichlorohydrin is stirred and reacted with the diol obtained above at 30°C for 3 hours to obtain an epoxy monomer containing a dynamic covalent bond; hexylamine is used as The catalyst is an aliphatic diamine curing agent containing a mercapto-Michael addition bond prepared by reacting equimolar equivalents of aminoethyl methacrylate and 2-aminoethanethiol. After blending 80 parts by mass of the above-mentioned epoxy monomer and 20 parts by mass of tert-butyl (oxirane-2-ylmethyl) carbamate, the temperature was raised to 65°C, and it was designated as component A; Take 4 parts by mass of foaming agent Celogen-OT, 0.5 parts by mass of surfactant Plur...

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Abstract

The present invention discloses an energy absorbing method, which performs energy absorbing by using a hybrid dynamic polymer, wherein the hybrid dynamic polymer contains a dynamic covalent bond and asupramolecular hydrogen bond, and the dynamic covalent bond is a thiol-Michael addition bond. According to the present invention, the supramolecular hydrogen bonding contained in the dynamic polymercan make the material have the multi-level dynamic reversibility so as to achieve the combined energy absorbing characteristics of energy absorbing, energy dissipation, energy dispersion and the like,and the dynamic covalent bond based on the thiol-Michael addition bond can provide dynamically covalent self-repair and other properties, such that the energy absorbing material based on the hybrid dynamic polymer can provide damping, shock absorption, sound insulation, noise reduction, impact resistance and other good energy absorbing functions, and is suitable for body protection in sports anddaily life and work, military and police body protection, anti-impact protection of electronic and electrical products, explosion prevention, airborne protection, airdrop protection, vehicle collisionprevention, industrial units, noise reducing of home appliances, and other fields.

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. In order to alleviate and eliminate the impact of this physical impact, it is necessary to use energy-absorbing methods and energy-absorbing materials for energy-absorbing protection. The existing energy absorption methods mainly include active energy absorption and passive energy absorption. The former is a method including the use of shock absorbers to absorb energy, and the latter is to use materials with energy-absorbing functions. The materials used for energy absorption mainly include metals, polymers, composite materials and oth...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/32C08G18/50C08G65/332C08G65/333C08G65/334
CPCC08G18/6666C08G18/3876C08G18/5021C08G65/3322C08G65/33324C08G65/3344C08G2650/04
Inventor 不公告发明人
Owner 厦门逍扬运动科技有限公司
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