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Composite damping material and preparation method thereof

A composite damping material and polymer technology, applied in the field of vibration damping materials, can solve problems such as poor damping effect in high temperature areas, complicated damping material preparation process, and restrictions on high temperature applications, to achieve good damping effect, excellent damping effect, and vibration reduction The effect of noise reduction

Active Publication Date: 2020-03-31
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the above-mentioned damping material is narrow in the effective high-temperature region, and the damping effect in the high-temperature region is poor, which limits its high-temperature application; in addition, the preparation process of the above-mentioned damping material is relatively complicated

Method used

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  • Composite damping material and preparation method thereof
  • Composite damping material and preparation method thereof
  • Composite damping material and preparation method thereof

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preparation example Construction

[0072] The present invention also provides a method for preparing the composite damping material described in the above technical solution, comprising the following steps:

[0073] a) Under the action of the initiator, the acrylate monomer, the vinyl heterocyclic compound and the chain transfer agent are polymerized to obtain a polymer matrix;

[0074] b) mixing the polymer matrix with nano-heteropolyacid particles to obtain a composite damping material;

[0075] The acrylate monomer is one or more of acrylate and methacrylate;

[0076] The ester group in the acrylate monomer is a C1-C8 ester group;

[0077] The vinyl heterocyclic compound is selected from one or more of vinylimidazole, 2-vinylpyridine and 4-vinylpyridine;

[0078] The chain transfer agent is 1-(O-ethylsulfonate)ethylbenzene.

[0079] According to the invention, under the action of the initiator, the acrylic acid ester monomer, the vinyl heterocyclic compound and the chain transfer agent are polymerized to ...

Embodiment 1

[0110] 1.1 Preparation of materials

[0111] S1. Pass vinylimidazole and butyl acrylate through a neutral alumina column to remove the polymerization inhibitor. Mix according to the mol ratio of butyl acrylate: vinylimidazole=9: 1, meanwhile, add chain transfer agent and initiator according to the mol ratio of butyl acrylate monomer: chain transfer agent: initiator=100: 1: 0.2; Then add anhydrous dioxane solvent (butyl acrylate monomer: solvent = 10g: 6mL), freeze and pump three times, then react at 70°C for 12h under nitrogen, and dissolve the resulting reaction solution in a mixture of methanol and water. (The volume ratio of methanol:water is 85:15) precipitated out, and dried under vacuum at 80° C. to obtain the polymer represented by formula (1).

[0112] The reaction scheme of above-mentioned reaction is as follows:

[0113]

[0114] The molecular weight of the obtained polymer and the molar ratio of butyl acrylate fragments to vinylimidazole fragments in the polyme...

Embodiment 2

[0123] 1.1 Preparation of materials

[0124] S1. Pass 2-vinylpyridine and hexyl methacrylate through a neutral alumina column to remove the polymerization inhibitor. Mix according to the molar ratio of hexyl methacrylate:2-vinylpyridine=9:1, meanwhile, add the chain according to the molar ratio of hexyl methacrylate monomer:chain transfer agent:initiator=100:1:0.2 transfer agent and initiator; then add anhydrous dioxane solvent (hexyl methacrylate monomer: solvent = 10g: 6mL), freeze and pump three times, then react at 70°C for 12h under nitrogen, and the resulting reaction solution Precipitate in methanol and dry under vacuum at 80°C to obtain the polymer represented by formula (1).

[0125] The molecular weight of the obtained polymer and the molar ratio of butyl acrylate fragments to vinylimidazole fragments in the polymer chain were tested by GPC and NMR respectively. The results showed that the number average molecular weight was 162300 g / mol, m was 914.2, and n was 61.2...

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Abstract

The invention provides a composite damping material and a preparation method thereof. The composite damping material provided by the invention comprises a polymer matrix and nano heteropoly acid particles dispersed in the polymer matrix, the polymer has a structure as shown in a formula (1). According to the invention, a specific acrylate compound structure is combined with a specific vinyl heterocyclic structure; wherein the vinyl heterocyclic structure can provide association sites, then the polymer with the specific structure is combined with the nano heteropoly acid particles, a pluralityof association sites exist between a polymer molecular chain and the heteropoly acid particles, and physical association-ion interaction is generated; when the composite damping material receives external stimulation under a high-temperature condition, energy can be dissipated through disassociation between macromolecular chains, so that an excellent damping effect is achieved; in addition, the composite damping material provided by the invention also has a good damping effect at a low frequency, and vibration and noise reduction can be effectively realized in a relatively wide frequency range.

Description

technical field [0001] The invention relates to the technical field of damping materials, in particular to a composite damping material and a preparation method thereof. Background technique [0002] With the rapid development of the national economy and the widespread use of high-speed machinery, the pollution of vibration and noise is becoming more and more serious. The harm of noise and pollution is reflected in: physical and mental harm to people, interference with the normal use of equipment and instruments Concealment of equipment. In view of the above problems, the use of damping materials to reduce vibration and noise is one of the main technical measures, and it is also the most economical, convenient and effective method. [0003] Because polymer materials have outstanding viscoelasticity, huge internal friction, and super-strong damping effect, they have become the most widely used noise reduction materials or damping materials in engineering. Damping material i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/08C08L33/10C08K3/34C08F220/18C08F226/06
CPCC08F220/18C08K3/34C08K2201/003C08K2201/011C08L33/08C08L33/10
Inventor 陈全贺庆宾张志杰
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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