Combined energy absorption method and application thereof

A polymer, dynamic covalent bond technology used in the field of combined energy absorption

Inactive Publication Date: 2020-07-07
翁秋梅
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  • 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, altho

Method used

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

Examples

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preparation example Construction

[0643] 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.

[0644] 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.

[0645] 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

[0666] Using 1,6-hexamethylene diisocyanate and furan methanol as raw materials, dichloromethane as solvent, and stannous octoate as catalyst, control the molar ratio of the two to 1:2, react at room temperature for 2 hours under nitrogen protection, and reflux After reacting for 2h, the difuran compound (a) was obtained. Quantitative diphenylmethane diisocyanate and polyoxypropylene diol PPG-700 are reacted to make isocyanate-terminated polyether.

[0667] Weigh a certain amount of dichloromethane solvent in a dry and clean flask, add 8mmol N-hydroxymaleimide and 4mmol 8-hydroxybenzo[a]pyrene, mix well, heat to 100°C and blow nitrogen to remove water and oxygen for 1h , then slowly add 7mmol of isocyanate-terminated polyether, react at 80°C for 2h under nitrogen protection, then cool down to 60°C, add 4mmol of difuran compound (a), 5wt% silicon dioxide, 5wt% barium sulfate, 0.02wt% Sodium dodecylbenzenesulfonate, 0.02wt% bentonite, continue to stir and react for 1 hour to ob...

Embodiment 2

[0669] Using vinyl boronic acid and hydrogen-terminated silicone oil with a viscosity of about 3,000mPa·s as raw materials, the boric acid-terminated silicone oil is obtained by hydrosilylation under the catalysis of platinum olefin complex Pt(dvs). Using 4-methyl-4-pentenoic acid and hydrogen-terminated silicone oil with a viscosity of about 3,000mPa·s as the raw material, the carboxylic acid sealant was prepared by hydrosilylation under the catalysis conditions of the platinum ene complex Pt(dvs). end silicone oil.

[0670] Using amino-terminated silicone oil with a viscosity of about 2,000mPa·s as a raw material, the reaction is carried out in the presence of an equimolar equivalent catalyst, triethyl orthoacetate, to obtain amidinyl-terminated silicone oil.

[0671] Add 0.02mol of boric acid-terminated silicone oil, 0.02mol of diglyceryl ether, 0.02mol of amidinyl-terminated silicone oil, 0.02mol of carboxylic acid-terminated silicone oil into a dry and clean three-necked ...

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Abstract

The invention discloses a combined energy absorption method and application thereof. According to the combined energy absorption method, a dynamic polymer containing dynamic covalent bonds and a supramolecular interaction is adopted for energy absorption. According to the dynamic polymer, dynamic covalent bonds with different dynamic properties and the supramolecular interaction are introduced, sothat a dynamic polymer material which is wide in controllable range, rich in structure and diversified in performance can be prepared. By utilizing the dynamic difference of the dynamic covalent bonds and the supramolecular interaction under different conditions, the dynamic polymer can embody dynamic reversible effects with orthogonality and synergy, so that good energy dissipation, dispersion and absorption characteristics are embodied, and damping and impact resistance effects are achieved on the material. The dynamic polymer can be applied to sports and body protection in daily life, military police body protection, explosion prevention, airborne landing and airdrop protection, automobile collision prevention, impact resistance protection of electronic and electrical products and thelike.

Description

technical field [0001] The present invention relates to a combined energy-absorbing method, in particular to a combined energy-absorbing method based on a dynamic polymer composed of dynamic covalent bonds and supramolecular interactions 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. Use the phenomenon that polymers have a high loss factor near their glass transition temperature to absorb energy. In this...

Claims

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Application Information

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