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Energy absorbing method based on dynamic polymer composition

A technology of polymer and composition, applied in the field of energy absorption, can solve the problems of no longer use, reduced energy absorption capacity and mechanical properties, etc.

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, in the above-mentioned processes, once the covalent bond breakage and macroscopic cracks and breakages occur, they cannot be recovered, which will lead to the reduction of the energy absorption capacity and mechanical properties of the material or even make it impossible to continue to use. Finally, the material must be replaced in time to maintain the original performance

Method used

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

Examples

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preparation example Construction

[0180] A preferred preparation method of a dynamic polymer composition ionic liquid gel of the present invention includes but is not limited to the following steps: adding each raw material and other raw materials for preparing components A and B of the dynamic polymer composition into the ionic liquid to make The sum of the mass fractions of the prepared dynamic polymer composition components A and B is 0.5-70%, and polymerization, coupling, cross-linking or other types of chemical reactions are carried out by the appropriate means, and after the reaction is completed, the A dynamic polymer composition ionic liquid gel. Another preferred preparation method of the dynamic polymer composition ionic liquid gel of the present invention includes but is not limited to the following steps: swelling the dynamic polymer composition components A, B and other raw materials in ionic liquid or containing In the solvent of the ionic liquid, the sum of the mass fractions of the components A...

Embodiment 1

[0240] Preparation of a dynamic polymer composition based on unsaturated polyester common solid for energy absorption.

[0241] Dissolve 2-chlorocyclohexanone in dichloromethane, add m-chloroperoxybenzoic acid, keep the molar ratio of 2-chlorocyclohexanone and m-chloroperoxybenzoic acid at 10:12, and react to obtain α-chloro-ε - caprolactone 1a. Under anhydrous conditions, dissolve 1 molar equivalent of 1a in toluene, add 1.3 molar equivalents of 1,5-diazabicyclo[4.3.0]non-5-ene, react at 80°C for 16 hours, and dissolve the crude product in water After extraction with hydrochloric acid, a mixture of compounds 1b, 1c is obtained. The mixture was further separated on a silica gel column with dichloromethane as eluent.

[0242]

[0243] Under anhydrous conditions, 120 molar equivalents of ε-caprolactone, 20 molar equivalents of 1a, and 100 molar equivalents of 1c were dissolved in toluene, and in 1 molar equivalent of initiator 2,2-dibutyl-2-tin-1,3- Under the trigger of di...

Embodiment 2

[0248] Preparation of a polyacetylene-based dynamic polymer composition hydrogel for energy absorption in which supramolecular interactions are based on pendant pyrrolidone groups.

[0249] Under nitrogen protection, a certain amount of p-acetylene benzoic acid was dissolved in sodium hydroxide aqueous solution (sodium hydroxide concentration was 10M), keeping the molar ratio of monomer to sodium hydroxide at 2:3. Add catalyst [Rh(cod) at 30°C 2 ] BF 4 aqueous solution, adjust the monomer and catalyst concentrations to 0.5M and 0.0025M, respectively. After 3 hours, the resulting polymer was precipitated in ethanol, dried and dissolved in water again, acidified with hydrochloric acid and centrifuged to obtain poly[(4-carboxyphenyl)acetylene].

[0250] A certain amount of the obtained polymer, 4-hydroxyl-2-pyrrolidone, and butenediol are reacted under the catalysis of dicycloethylcarbodiimide (DCC) and 4-dimethylaminopyridine (DMAP), and the carboxyl, The molar ratio of 4-hyd...

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Abstract

The present invention discloses an energy absorbing method based on a dynamic polymer composition, and provides a dynamic polymer composition and applications of the dynamic polymer composition as theenergy absorbing material to carry out energy absorbing, wherein the dynamic polymer composition at least contains a component A and a component B, the component A is a dynamic polymer comprising atleast a cross-linking network, and contains an unsaturated carbon-carbon double bond capable of being subjected to an olefin cross translocation double decomposition reaction and an optional hydrogenbond group capable of forming supramolecular hydrogen bond action, and the component B is a catalyst and / or a complex thereof for catalyzing the exchange reaction of the dynamic covalent bond in the component A. According to the present invention, the composition as the energy absorbing material can provide good impact resistance (protection), good damping, good shock absorption, good buffer, goodsound insulation, good noise reduction and other functions, and by interacting with the optional supramolecular hydrogen bond, the material can have characteristics stimulating responsiveness, self-healing property, recyclability, repeatable processability and the like, and can be used in all aspects of daily life and various professional fields.

Description

technical field [0001] The present invention relates to an energy absorption method, in particular to an energy absorption method based on a dynamic polymer composition comprising at least two components A and B. Background technique [0002] In daily life, sports, leisure and entertainment, military, police, security, medical care, production and other activities, human bodies, animal bodies and objects are often seriously affected by physical shocks such as impact, vibration, vibration, explosion, and sound. By using energy-absorbing materials to absorb energy, such physical impacts can be effectively protected and alleviated, so as to achieve effects such as impact resistance, damping, shock absorption, buffering, sound insulation, and noise reduction. At this stage, the materials used for energy absorption mainly include metals, polymers, and composite materials. A common energy absorption mechanism of polymer materials is to absorb energy by the breaking of chemical bo...

Claims

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Application Information

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IPC IPC(8): C08J3/24
CPCC08J3/24C08J3/246C08J2329/04C08J2333/08C08J2345/00C08J2347/00C08J2349/00C08J2367/06C08J2371/02C08J2375/04C08J2375/14C08J2433/08C08J2467/06Y02P20/54
Inventor 不公告发明人
Owner 翁秋梅
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