Energy absorbing method based on dynamic cross-linking polymer

A dynamic cross-linking, polymer technology, applied in the field of energy absorption, can solve the problems of impact energy dissipation, human injury, limited shock absorption performance, etc.

Inactive Publication Date: 2019-04-23
翁秋梅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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, ord

Method used

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  • Energy absorbing method based on dynamic cross-linking polymer
  • Energy absorbing method based on dynamic cross-linking polymer
  • Energy absorbing method based on dynamic cross-linking polymer

Examples

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preparation example Construction

[0174] 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.

[0175] 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.

[0176] 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 press...

Embodiment 1

[0222] Add 200ml of toluene solvent into a dry and clean reaction bottle, and then add 8g of styrene and 1.26g of 1,3,5-triacryloylhexahydro-1,3,5-triazine after passing argon to remove water and oxygen for 1 hour (a), 1.2wt% benzoyl peroxide was heated to 80°C under the protection of argon for 5h to form a cross-linked network, and then the product was placed in a suitable mold and dried in a vacuum oven at 80°C for 24h to finally obtain a hard A translucent polymer solid with a smooth surface, a certain degree of gloss and surface hardness. In this embodiment, the obtained polymer solid can be used as an anti-shock protection material, such as the housing of home appliances, telephone housings, instruments and meters, etc., to protect and buffer the articles. When cracks appear on the surface, it can The samples were impregnated with hydrochloric acid aqueous solution and heated at 130°C to realize the self-healing of cracks.

[0223]

Embodiment 2

[0225] Using AIBN as the initiator and triethylamine as the catalyst, it is prepared by thiol-ene click reaction with equimolar amounts of 1,4-butenediol and N-[(2-mercaptoethyl)carbamoyl]propionamide Hydroxyl double-terminated compound; DCC and DMAP are used as condensation reagents to obtain olefin double-terminated compound through esterification with acrylic acid; then AIBN is used as initiator and triethylamine as catalyst, and 2-amino Amino compound (a) was prepared from ethanethiol by thiol-ene click addition reaction.

[0226] Add 20g of aldehyde-terminated polyethylene glycol 2,000, 3g of amino compound (a), 1.62g of trimesaldehyde, and 0.2mg of antioxidant BHT into a dry and clean three-necked flask, heat to 50°C for stirring reaction, and react for 2 hours , cooled to room temperature, a light yellow transparent viscous sample can be obtained, which has good resilience and can be used as a protective coating to coat the surface of the substrate to protect the substr...

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Abstract

The present invention discloses an energy absorbing method based on a dynamic cross-linking polymer, wherein the method performs energy absorbing by using a dynamic cross-linking polymer containing ahexahydrotriazine dynamic covalent bond and an optional hydrogen bond. According to the present invention, by introducing the hexahydrotriazine dynamic covalent bond and the optional hydrogen bond, the dynamic polymer material with characteristics of wide controllable range, rich structure and various properties can be prepared; the dynamic cross-linking polymer can have the energy dissipation characteristic through the hexahydrotriazine dynamic covalent bond and the optional hydrogen bond, such that the dynamic cross-linking polymer as the energy absorbing material can provide good damping, good shock absorption, good sound insulation, good noise reduction, good impact resistance and other functions; and the dynamic cross-linking polymer can be used in body protection in sports and dailylife and work, military and police body protection, explosion prevention, airborne protection, airdrop protection, vehicle collision prevention, anti-impact protection of electronic and electrical products, and other fields.

Description

technical field [0001] The invention relates to an energy absorbing method, in particular to an energy absorbing method based on a dynamic cross-linked polymer composed of hexahydrotriazine dynamic covalent bonds and optional hydrogen bonds. 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, becaus...

Claims

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Application Information

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IPC IPC(8): C08J3/24
CPCC08J3/24C08J3/246C08J2315/00C08J2325/08C08J2383/08
Inventor 不公告发明人
Owner 翁秋梅
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