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Energy absorption method and material based on hybrid cross-linked dynamic polymer

A technology of hybrid cross-linking and polymer, applied in the field of energy-absorbing methods and materials

Pending Publication Date: 2020-07-07
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 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 and material based on hybrid cross-linked dynamic polymer
  • Energy absorption method and material based on hybrid cross-linked dynamic polymer
  • Energy absorption method and material based on hybrid cross-linked dynamic polymer

Examples

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preparation example Construction

[0690] In the preparation process of hybrid cross-linked dynamic polymer foam materials, three methods of mechanical foaming, physical foaming and chemical foaming are mainly used to foam dynamic polymers.

[0691] 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.

[0692] 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 ...

Embodiment 1

[0714] Dissolve 1 molar equivalent of 4-(chloromethyl)benzoyl chloride in a mixed solution of diethyl ether / n-hexane equal volume ratio, slowly drop into an aqueous solution containing 1.3 molar equivalents of lithium peroxide at 0°C, and react at 0°C for 6 hours, A peroxybifunctional initiator is obtained. Using acetonitrile as a solvent, the resulting bifunctional initiator initiates free radical copolymerization of vinylidene fluoride and hexafluoropropylene at 90°C to obtain a fluorine-containing copolymer (a). Use equimolar amounts of 2-aminomethylphenylboronic acid and 2-(4-aminobutyl)propane-1,3-diol as raw materials, tetrahydrofuran as a solvent, and carry out condensation reaction at 50°C and pH=8 Amino compound (b) is obtained.

[0715] Weigh 50g of low molecular weight polyethylene, 1g of maleic anhydride, 0.1g of dicumyl peroxide and mix evenly, utilize a small extruder to melt and knead, and pelletize to obtain maleic anhydride grafted polyethylene, wherein the e...

Embodiment 2

[0718]

[0719] 6-bromo-1-hexene is reacted with excess sodium azide to obtain 6-azido-1-hexene; 1 molar equivalent of propargyl acrylate and 1 molar equivalent of 6-azido-1- Hexene was reacted in cyclohexanone at 90°C for 3h to obtain diene compound (a).

[0720] The Zr-FI catalyst is used to catalyze the polymerization of ethylene to generate vinyl-terminated polyethylene, which is then reacted with 4-mercaptophenylboronic acid through mercaptan-alkene click addition reaction to prepare the organoboronic acid compound (b).

[0721]Dissolve 0.03mol tetraboric acid and 8mmol organic boric acid compound (b) in a certain amount of toluene solvent, add an appropriate amount of calcium chloride dehydrating agent, heat to 80°C and stir for 5 hours to form the first network; then add 0.02mol pentaerythritol tetra Thioglycollate, 0.02mmol diene compound (a), 0.02mol 3-(diallylamino)propionitrile, 0.02mol 1,11-dibromoundecane, 3wt% organic bentonite, 2wt% metal osmium Aromatic rin...

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Abstract

The invention discloses an energy absorption method and a material based on a hybrid cross-linked dynamic polymer. The hybrid cross-linked dynamic polymer contains at least one boron-free dynamic covalent bond, optionally at least one boron-containing dynamic covalent bond, optionally at least one supramolecular interaction and common covalent cross-linking formed by common covalent bonds, whereinthe common covalent cross-linking reaches above the gel point of the common covalent cross-linking in at least one cross-linked network. According to the dynamic polymer, a common covalent cross-linking system and dynamic components are introduced, and boron-free dynamic covalent bonds in the dynamic polymer and differences between the boron-free dynamic covalent bonds and optional boron-containing dynamic covalent bonds and supramolecular interaction are utilized, so that the polymer material which is wide in controllable range, rich in structure and diversified in energy absorption performance can be prepared. The polymer material has the effects of dissipating, dispersing and absorbing impact energy and the like, and can be applied to damping, buffering, impact resistance protection, noise reduction, sound insulation, shock absorption and the like.

Description

technical field [0001] The invention relates to an energy-absorbing method and material, in particular to an energy-absorbing method and material 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 temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08G83/00
CPCC08J3/24C08J3/246C08G83/008
Inventor 不公告发明人
Owner 厦门逍扬运动科技有限公司
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