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Energy absorbing method based on hybrid dynamic polymer composition

A technology of polymer and composition, applied in the field of energy absorption of hybrid dynamic polymer composition, can solve the problems of limited shock absorption, impact energy dissipation, human injury, etc., and achieve strong dynamics, unique low temperature performance, Effect of Sensitive Sensitivity

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

AI Technical Summary

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, ordinary protective materials cannot effectively dissipate the impact energy, and there will still be A strong impact force acts on the human body or equipment, which may cause personal injury or equipment damage

Method used

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  • Energy absorbing method based on hybrid dynamic polymer composition
  • Energy absorbing method based on hybrid dynamic polymer composition
  • Energy absorbing method based on hybrid dynamic polymer composition

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preparation example Construction

[0166] In the preparation process of dynamic polymers, three methods of mechanical foaming, physical foaming and chemical foaming are mainly used to foam dynamic polymers.

[0167] 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.

[0168] 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 pressure, and then ...

Embodiment 1

[0223]

[0224] Mix 1,3,5,7-tetravinyl-1,3,5,7-tetramethylcyclotetrasiloxane and 1,3,5,7-tetramethylcyclotetrasiloxane in a molar ratio of 1 The ratio of : 1 was reacted under the catalysis of chloroplatinic acid, and compound 1 was obtained after sufficient reaction; the ratio of compound 1 and 1,3,5,7-tetramethylcyclotetrasiloxane was 1: 2 in Tetramethylammonium hydroxide pentahydrate and Pt are co-catalyzed by ring-opening polymerization, and 0.5 mg of BHT antioxidant is added to the system, and a transparent polysiloxane material is obtained after 4 hours. Make it into a dumbbell-shaped sample with a size of 80.0×10.0×2.0mm, and use a tensile testing machine to perform a tensile test. The tensile rate is 10mm / min. The measured tensile strength of the sample is 1.54±0.25MPa, and the elongation at break The rate is 436.27±53.78%; stress is applied to the section after cutting it (the section can be slightly wetted during this process), and the section can be rebonded afte...

Embodiment 2

[0226] Add a certain amount of deionized water, concentrated hydrochloric acid with a concentration of 37%, ethanol and hexamethyldisiloxane in sequence in the reactor, stir and heat up to 35°C; then, the sodium silicate solution is stirred rapidly Then, add 3-aminopropyl-methyl-diethoxysiloxane, and stir the reaction at 50-60°C until the solution is separated and a white viscous product is formed Then, let it stand for 2 hours, remove the dilute hydrochloric acid ethanol solution in the upper layer, wash the resin product in the lower layer with water until neutral; finally add a certain amount of toluene for extraction, and then undergo vacuum distillation to obtain the organic silicon with amino group in the side group resin. The obtained product was reacted with ethyl isocyanate in molar ratio at 80°C for 2 hours, and the product was dehydrated with lithium hydroxide to obtain a silicon alkoxide-terminated modified silicone resin gel. The obtained The polymer material is ...

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Abstract

The present invention discloses an energy absorbing method based on a hybrid dynamic polymer composition, and provides a hybrid dynamic polymer composition and applications of the hybrid dynamic polymer composition as the energy absorbing material to carry out energy absorbing, wherein the hybrid dynamic polymer composition at least contains a component A and a component B, the component A contains a dynamic polymer of a dynamically exchangeable siloxane bond and an optional hydrogen bond group, and the component B contains a catalyst and / or a complex thereof for carrying out a siloxane equilibrium reaction. According to the present invention, the dynamically exchangeable siloxane bond in the dynamic polymer can make the covalent structure of the energy absorbing material have the dynamicexchangeability, the optional hydrogen bond group has the supramolecular dynamic reversibility so as to conveniently make the material have the dilatancy and the supramolecular dynamic exchangeability, and the dynamic covalent and supramolecular effects further have orthogonality and / or synergy, such that good energy dissipation, good dispersion and other energy absorbing characteristics can be achieved; and the dynamic polymer can be used in body protection in sports and daily life and work, military and police body protection, explosion prevention, bullet prevention, airborne protection, airdrop protection, vehicle collision prevention, anti-impact protection of electronic and electrical products, and other fields.

Description

technical field [0001] The present invention relates to an energy-absorbing method based on a hybrid dynamic polymer composition, in particular to an energy-absorbing method of a hybrid dynamic polymer composition composed of dynamically exchangeable siloxane bonds and supramolecular 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: 1. Utilize the phenomenon that polymers have a high loss factor near their glass transitio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08L83/07C08L83/08C08L83/05C08L83/04
CPCC08J3/24C08J3/246C08J2383/04C08J2383/05C08J2383/07C08J2383/08
Inventor 不公告发明人
Owner 翁秋梅
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