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Viscoelastic sandwich material, large-damping sandwich composite material and preparation method and application thereof

A technology of sandwich materials and composite materials, which is applied in the fields of viscoelastic sandwich materials, large damping sandwich composite materials and their preparation, and achieves the effect of wide application prospects.

Active Publication Date: 2022-02-01
WEIFANG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006]The large damping sandwich composite material in the present invention relies on the polymer viscoelastic material and the resin matrix to produce physical fusion or chemical crosslinking, in terms of molecular chemical bonds It solves the problem of interfacial bonding, thereby greatly improving the damping performance of the overall structure and greatly improving the interfacial mechanical properties of the structure, with high temperature resistance and high mechanical properties; Shuangma resin-based carbon fiber composites have excellent mechanical properties, High temperature resistance and other characteristics, it has been more and more widely used in aircraft, missiles, satellites, high-speed rail and other structures

Method used

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  • Viscoelastic sandwich material, large-damping sandwich composite material and preparation method and application thereof
  • Viscoelastic sandwich material, large-damping sandwich composite material and preparation method and application thereof
  • Viscoelastic sandwich material, large-damping sandwich composite material and preparation method and application thereof

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preparation example Construction

[0052] In one embodiment of the present invention, a method for preparing the above-mentioned large damping sandwich composite material is provided, including:

[0053] (1) Preparation of viscoelastic sandwich material;

[0054] (2) Modulation of damping mortar;

[0055] (3) Preparation of large damping sandwich composite materials.

[0056] In one or more embodiments, the preparation of the viscoelastic core material described in step (1), the steps include:

[0057] (3) First cut tetrapropylene fluorine rubber into rubber strips, and carry out rubber breaking, plasticizing and thinning of tetrapropylene fluorine rubber;

[0058] (4) Mixing of tetrapropylene fluorine rubber: control the temperature of the double rollers of the open mill at 50°C-70°C, add the short fibers to the tetrapropylene fluoride rubber in stages and mix for 5-6min to make the short fibers uniform and orderly Disperse in the rubber matrix, then add ZDMA and NaSA to tetrapropylene fluorine rubber and m...

Embodiment 1

[0091] 1. The mass parts of the viscoelastic sandwich material are: tetrapropylene fluororubber 100 parts; crosslinking agent TAIC 5 parts; vulcanization aid HVA-25 parts; vulcanizing agent BIBP 1.2 parts; ZDMA 40 parts; activator NASA 1.5 parts ; Short fiber 15 parts.

[0092] 2. Cutting of the original rubber, first cut the tetrapropylene fluorine rubber into 30mm×20mm×100mm rubber strips with a special cutter, so that it can be placed more easily on such as Figure 4 in the mill;

[0093] 3. For the mixing of rubber, the temperature of the double rollers of the open mill is controlled at 60°C. Due to the poor processing performance of the short fiber, the short fiber should be added to the tetrapropylene fluororubber step by step according to the principle of adding an appropriate amount and mixed for 5.5 minutes. The short fibers can be uniformly and orderly dispersed in the rubber matrix. In the next step, ZDMA and NaSA are added to the tetrapropylene fluorine rubber and...

Embodiment 2

[0108] 1. The mass parts of the viscoelastic sandwich material are: tetrapropylene fluororubber 90 parts; crosslinking agent TAIC 4 parts; vulcanization aid HVA-2 4 parts; vulcanizing agent BIBP 1 part; ZDMA 30 parts; parts; short fiber 10 parts.

[0109] 2. Cutting of the original rubber, first cut the tetrapropylene fluorine rubber into 30mm×20mm×100mm rubber strips with a special cutter, so that it can be placed more easily on such as Figure 4 in the mill;

[0110]3. For rubber mixing, the temperature of the double rollers of the open mill is controlled at 50°C. Due to the poor processing performance of short fibers, it is necessary to add short fibers to tetrapropylene fluororubber in batches according to the principle of adding an appropriate amount and mix for 5 minutes. The short fibers can be uniformly and orderly dispersed in the rubber matrix. In the next step, ZDMA and NaSA are added to the tetrapropylene fluorine rubber and mixed for 4 minutes to improve the comp...

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Abstract

The invention relates to the technical field of high polymer materials, in particular to a viscoelastic sandwich material, a large-damping sandwich composite material and a preparation method and application thereof. According to the large-damping sandwich composite material, a carbon fiber prepreg serves as a neutral layer to be embedded into a bismaleimide resin matrix composite material, the surface of the carbon fiber prepreg is provided with viscoelastic sandwich materials with different thicknesses, and the viscoelastic sandwich materials comprise the following components in parts by mass: 90-110 parts of tetrafluoroethylene-propylene rubber; 4-6 parts of a cross-linking agent TAIC; 4-6 parts of a vulcanizing aid HVA-2; 1-1.5 parts of a vulcanizing agent BIBP; 30-50 parts of ZDMA; 1-2 parts of an activator NASA; and 10-20 parts of short fibers. The large-damping sandwich composite material has good high-temperature resistance and high interface shear strength, meanwhile, the fracture surface of the large-damping sandwich composite material occurs in the sandwich material of the neutral layer, and the composite structure has excellent mechanical properties; and the damping performance of the composite material is greatly improved through embedding of the sandwich material, and the material has a wide application prospect in aerospace.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a viscoelastic sandwich material, a large damping sandwich composite material and a preparation method and application thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Due to their high specific strength, high specific stiffness and excellent damping properties, composite materials have been widely used in aerospace in recent years. However, traditional damping composite materials can only be used in an environment below 160 °C, and cannot withstand high temperature and high pressure above 200 °C, and the requirements for the interface bonding strength are ve...

Claims

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Application Information

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IPC IPC(8): C08L27/18C08L77/10C08K5/14C08K5/3415C08J5/24C08K7/06B32B27/04B32B27/06B32B9/00B32B9/04B32B27/12B32B27/28
CPCC08L27/18C08J5/24B32B27/06B32B5/02B32B27/12B32B27/281C08J2327/18C08K7/06B32B2260/021B32B2260/046C08L77/10C08K5/14C08K5/3415
Inventor 郑长升李强张庆荣王瑞春王绍清刘炳昌
Owner WEIFANG UNIV OF SCI & TECH
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