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Energy absorption method based on hybrid cross-linked dynamic polymer

A technology of hybrid cross-linking and polymer, applied in the field of energy absorption

Inactive Publication Date: 2020-04-21
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 energy-absorbing structures 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 absorption method based on hybrid cross-linked dynamic polymer
  • Energy absorption method based on hybrid cross-linked dynamic polymer
  • Energy absorption method based on hybrid cross-linked dynamic polymer

Examples

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preparation example Construction

[0374] 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.

[0375] 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.

[0376] 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 high ...

Embodiment 1

[0396] Using 3-acrylamido dopamine as raw material and AIBN as initiator, acrylamide-dopamine copolymer was prepared by free radical polymerization with N,N-dimethylacrylamide.

[0397] Weigh a certain amount of N,N-dimethylacrylamide, dissolve it in deionized water to prepare a 1mol / L solution, add 1mol% of cross-linking agent N,N'-methylenebis Acrylamide, 0.6 mol% initiator potassium persulfate, stirred and mixed evenly, left to stand for 1 hour to remove air bubbles, placed in a constant temperature water bath at 60°C for 4 hours to obtain a polyacrylamide gel. Weigh a certain amount of acrylamide-dopamine copolymer and dissolve it in deionized water to form a 0.5mol / L solution, then add an appropriate amount of sodium borate, dropwise add a small amount of NaOH solution and mix evenly, after reacting for 2 hours, add 0.05mol sodium alginate, And the previously prepared polyacrylamide gel was swollen in the mixed solution, and 0.05mol / L CaCl was added dropwise 2 Solution, ...

Embodiment 2

[0399]

[0400] Using acrylamide and 3-acrylamide phenylboronic acid as raw materials and AIBN as an initiator, acrylamide-phenylboronic acid copolymer (a) is obtained through RAFT radical polymerization.

[0401] Take a certain amount of sodium alginate dissolved in deionized water to prepare a 0.1mol / L solution, take 50ml and add it to a dry and clean three-necked flask, add 5ml Ca-EDTA / GDL mixed solution dropwise, and then add 15g acrylamide-benzene Boric acid copolymer (a), 8g polyvinyl alcohol, 200ml deionized water, heated to 50°C and stirred for 30min to dissolve, then added 2ml of triethylamine, continued to stir and react at 50°C for 2h to form the first network. Then add 10g polyacrylic acid, after stirring and dissolving, add 0.84g aziridine cross-linking agent (b) to continue the reaction for 1h, after the reaction ends, a hybrid cross-linked multi-network hydrogel is obtained. In this example, the prepared polymer hydrogel can be used as a composite packaging m...

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Abstract

The invention discloses an energy absorption method based on a hybrid cross-linked dynamic polymer. The hybrid cross-linked dynamic polymer contains at least one boron-containing dynamic covalent bond, at least one non-hydrogen-bond type supramolecular interaction and common covalent cross-linking formed by common covalent bonds, wherein the common covalent cross-linking reaches a gel point of thecommon covalent cross-linking or above in at least one cross-linking network. The dynamic polymer combines the respective advantages of the boron-containing dynamic covalent bond, the supramolecularinteraction and the common covalent cross-linking, and has excellent energy dissipation, dispersion, absorption and other characteristics when subjected to physical impact by regulating and controlling the structure of reactants. The dynamic polymer is used as an energy absorbing material to absorb energy, and can play roles in damping, buffering, shock resistance protection, shock absorption, noise elimination, sound insulation and the like.

Description

technical field [0001] The invention relates to an energy absorbing method, in particular to an energy absorbing method based on a hybrid cross-linked dynamic polymer. 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. Use the phenomenon that polymers have a high loss factor near their glass transition temperature to absorb energy. In this method, because the material is near the glass transition temperature, the mechanical prop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08G83/00
CPCC08G83/008C08J3/24C08J3/246
Inventor 不公告发明人
Owner 厦门逍扬运动科技有限公司
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