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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: 2019-01-15
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 absorption range has been expanded to a certain extent and the energy absorption 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

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preparation example Construction

[0240] In the preparation process of dynamic polymer, three methods of mechanical foaming method, physical foaming method and chemical foaming method are mainly used to foam dynamic polymer.

[0241] 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 gel and solidify to become a foam material. In order to shorten the molding cycle, air can be introduced and emulsifiers or surfactants can be added.

[0242] 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 mater...

Embodiment 1

[0302] Add 1 molar equivalent of acrylamide, 2 molar equivalents of acryloyloxyethyltrimethylammonium chloride in No. 1 reactor, and add 0.5 molar equivalent of 1,3-butadiene as a crosslinking agent, and then In No. 1 reactor, add enough water to fully dissolve the reactant, and add 0.02 molar equivalent of potassium persulfate and 0.02 molar equivalent of tetramethylethylenediamine (TEMED), stir the mixed solution into 30 After standing for 12 hours in an incubator at ℃, a dynamic polymer hydrogel was prepared. It was made into a dumbbell-shaped sample with a size of 80.0×10.0×2.0mm, and a tensile test was carried out using a tensile testing machine. The tensile rate was 50mm / min, and the measured tensile strength of the sample was 1.43±0.34MPa, and the elongation at break The ratio is 286.87±48.32. The dynamic polymer hydrogel has good toughness and self-healing property, and it can be used as a shock-absorbing pad.

Embodiment 2

[0304] Add 3.8 parts by mass of anisaldehyde and 2.3 parts by mass of aniline into reactor No. 1, dissolve them together in 250 parts by mass of methanol, and heat to reflux for 12 hours under a nitrogen atmosphere. Then add 1.5 parts by mass of NaBH 4 And continue to stir at room temperature for 12h, then add 10 parts by mass of 2mol / L hydrochloric acid solution, stir for 10min, then add NH 4 PF 6Saturated aqueous solution, after filtering, wash the precipitate with deionized water to obtain a white solid guest cross-linking agent; add 42 parts by mass of methyl acrylate, 18 parts by mass of 3-butene-2-alcohol, 5 parts by mass of 4-acrylamide benzo-18-crown ether-6, 6 parts by mass of (butylamino)-N-prop-2-enyl formamide, 0.12 parts by mass of dibenzoyl peroxide (BPO), 0.12 parts by mass of N,N-xylidine, 4.6 parts by mass of guest cross-linking agent, 150 parts by mass of DMF, stirred and reacted at room temperature for 1 h, then added 50 parts by mass of dimethyl sulfoxide...

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Abstract

The invention discloses an energy absorption method based on a hybrid cross-linked dynamic polymer. The absorption method employs a hybrid cross-linked dynamic polymer composed of covalent cross-linking formed by a covalent bond, and at least one of second group supramolecular interactions as well as an optional first group supramolecular interaction to absorb energy. Specifically, the second group supramolecular interactions include ion interaction, ion-dipole interaction, and subject-object interaction, metallophilic action, dipole-dipole interaction, halogen bond action, cation-pi interaction, anion-pi interaction, benzene-fluorobenzene interaction, pi-pi stacking interaction, ion hydrogen-bond interaction and free radical cation dimerization interaction. The first group supramolecularinteraction includes hydrogen-bond interaction and metal-ligand interaction. The dynamic polymer adopted by the invention can provide good damping, shock absorption, sound insulation, noise elimination, shock resistance and other functions when used as an energy absorption material, and is especially suitable for application to body protection, explosion protection, airborne landing and airdrop protection, automobile collision prevention, impact protection of electronic and electrical products, and other aspects.

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 composed of supramolecular action and covalent cross-linking. 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 transition temperature to absorb energy. In this method, because the mater...

Claims

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Application Information

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IPC IPC(8): C08G83/00C08F220/34C08F220/56C08F236/06C08F220/14C08F216/04C08F220/58C08G18/76C08G18/62C08F265/10
CPCC08F220/14C08F220/34C08F265/10C08G18/6266C08G18/7614C08G83/008C08F220/56C08F236/06C08F216/04C08F220/58C08F220/585
Inventor 不公告发明人
Owner 厦门逍扬运动科技有限公司
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