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Combined energy absorption method and application thereof

A polymer, selected technology, applied in the field of combined energy absorption, which can solve the problems of limited shock absorption, human injury, impact energy dissipation, etc.

Inactive Publication Date: 2020-07-07
翁秋梅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when this material is used in human body protection or precision instrument protection, the main disadvantage is that the shock absorption performance is limited. When subjected to severe impacts, ordinary protective materials cannot effectively dissipate the impact energy, and there will still be A strong impact force acts on the human body or equipment, which may cause personal injury or equipment damage

Method used

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  • Combined energy absorption method and application thereof
  • Combined energy absorption method and application thereof
  • Combined energy absorption method and application thereof

Examples

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preparation example Construction

[0302] In the preparation process of dynamic polymer foam materials, three methods of mechanical foaming, physical foaming and chemical foaming are mainly used to foam dynamic polymers.

[0303] 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.

[0304]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 pressu...

Embodiment 1

[0324] Add 4-hydroxyl-2,2,6,6-tetramethyl-1-oxypiperidine to the mixed solution of styrene and benzoyl peroxide, and heat to 90°C for 20h under the protection of nitrogen to obtain the compound ( a), wherein, the mol ratio of benzoyl peroxide and 4-hydroxyl-2,2,6,6-tetramethyl-1-oxypiperidine is 1:2; The solution was added to an aqueous KOH solution, and the compound (b) was obtained by reflux reaction under nitrogen protection conditions for 16 hours. Compound (b) and methacryloyl chloride were dissolved in anhydrous tetrahydrofuran solvent, and reacted at room temperature under argon protection conditions for 10 hours. Compound (c) is obtained.

[0325] Using AIBN as an initiator, styrene-pyridine copolymer was prepared by radical copolymerization of styrene and 4-vinylpyridine.

[0326] Add 200ml of dichloromethane solvent into a dry and clean reaction bottle, and after passing argon gas to remove water and oxygen for 1h, add 5g of styrene-pyridine copolymer and 0.61g of p...

Embodiment 2

[0329] Add 2 moles of 1,1,1,3,3,3-hexamethyldisilazane and 2 moles of 4-hydroxy-2,2,6,6-tetramethylpiperidine to the nitro In methane solution, heat to 50°C and stir to react, then add 2 moles of sodium acetate and DMF under nitrogen atmosphere to prepare intermediate product, cool the reaction solution to 0°C, add 1 mole of disulfur dichloride dropwise , continue to stir and react for 15min, pour into cold water, collect the product and dissolve it in n-hexane and use Na 2 SO 4 After drying and purification, the product was dissolved in methanol solvent, and an appropriate amount of K was added 2 CO 3 , stirred at room temperature for 4 h, purified and recrystallized with methanol to obtain the dihydroxy compound (a).

[0330] Weigh 25g styrene-maleic anhydride copolymer, 1.5g dihydroxy compound (a), 2.0g dithiocarbamate N-aminoethyl-S-aminoethyl ester (b), 5g blowing agent F141b, 0.16g photoinitiator DMPA, 0.8g tribasic lead sulfate, 0.4g di-n-butyltin laurate, 3 g dioct...

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Abstract

The invention discloses a combined energy absorption method and application thereof. According to the combined energy absorption method, a combined hybrid dynamic polymer containing at least two typesof dynamic covalent bonds and optional hydrogen bonds is adopted for energy absorption. According to the combined hybrid dynamic polymer, dynamic covalent bonds with different dynamic properties andoptional hydrogen bonds are introduced, so that a dynamic polymer material with a wide controllable range, rich structures and various properties can be prepared. When the polymer material is physically impacted, the polymer material has the effects of absorbing, dissipating, dispersing and the like on impact energy. The dynamic polymer is used as an energy absorption material for energy absorption, and has the effects of damping, buffering, impact resistance protection, noise elimination, sound insulation, shock absorption and the like.

Description

technical field [0001] The invention relates to a combined energy-absorbing method and its application, in particular to a combined energy-absorbing method based on a combined hybrid dynamic polymer composed of at least two types of dynamic covalent bonds and optional hydrogen bonds and its application. Background technique [0002] In daily life and actual production process, it is often necessary to use methods or means to avoid or slow down the impact of physical impact caused by impact, vibration, vibration, explosion, sound, etc. Among them, the most widely used is the use of a A kind of energy-absorbing material for energy absorption, so as to play an effective role in protecting against physical impact. Materials used for energy absorption mainly include metals, polymers, and composite materials. Among them, the energy loss sources of polymer materials mainly include the following types: 1. Using the phenomenon that polymers have a high loss factor near their glass t...

Claims

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Application Information

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IPC IPC(8): C08J3/24C08G83/00
CPCC08G83/008C08J3/24C08J3/246
Inventor 不公告发明人
Owner 翁秋梅
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